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Journal articles on the topic 'MQL with cold air'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Li, Ji Lin, and Lin Zhu. "Experimental Study on Low-Temperature Cold Cutting Technology." Advanced Materials Research 834-836 (October 2013): 795–98. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.795.

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With the development of environment-friendly cutting technology, the low-temperature MQL technology emerged. In order to solve the problem that caused by cutting heat, it adds the cold air on the foundation of MQL. In the view of low-temperature MQL studies which could reduce the cutting force and heat, we have done a lot of experiments. The experimental results show that the most important reason why the low-temperature MQL can reduce the cutting force effectively is a reliable lubricant film that between tool and chip. At the same time, the cold air take away a large amount of heat thereby i

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2

Lopes, José Claudio, Kamira Miksa Fragoso, Mateus Vinicius Garcia, et al. "Behavior of hardened steel grinding using MQL under cold air and MQL CBN wheel cleaning." International Journal of Advanced Manufacturing Technology 105, no. 10 (2019): 4373–87. http://dx.doi.org/10.1007/s00170-019-04571-8.

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3

An, Qing Long, Yu Can Fu, and Jiu Hua Xu. "The Application of Cryogenic Pneumatic Mist Jet Impinging in High-Speed Milling of Ti-6Al-4V." Key Engineering Materials 315-316 (July 2006): 244–48. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.244.

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To solve the problems caused by high temperature in the cutting zone during high-speed milling of Titanium alloys, some cooling methods are employed, such as cold air cooling, high pressure coolant jet impinging, MQL, etc. But all have their shortfalls, both in cooling efficiency and environmental pollution. Here a new high efficiency cooling technology-cryogenic pneumatic mist jet impinging (CPMJI) cooling technology is offered. In this technology, a little quantity of coolant is carried by high pressure cryogenic air (-20) and reaches the machining zone in the form of mist jet. This paper ma

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4

Jozić, Sonja, Ivana Dumanić, and Dražen Bajić. "EXPERIMENTAL ANALYSIS AND OPTIMIZATION OF THE CONTROLLABLE PARAMETERS IN TURNING OF EN AW-2011 ALLOY; DRY MACHINING AND ALTERNATIVE COOLING TECHNIQUES." Facta Universitatis, Series: Mechanical Engineering 18, no. 1 (2020): 013. http://dx.doi.org/10.22190/fume191024009j.

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The latest trends in machining research show that great efforts are being made to understand the impact of different cooling and lubrication techniques as well as cutting parameters on machining performances. This paper presents the investigation results of different cutting parameters and different cutting environments such as dry machining, minimum quantity lubrication (MQL) and minimum quantity lubrication with compressed cold air (MQL+CCA) on average surface roughness, cutting force and material removal rate. The experiments were designed based on three input parameters and three different

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5

Singh, Gurraj, Catalin Iulian Pruncu, Munish Kumar Gupta, et al. "Investigations of Machining Characteristics in the Upgraded MQL-Assisted Turning of Pure Titanium Alloys Using Evolutionary Algorithms." Materials 12, no. 6 (2019): 999. http://dx.doi.org/10.3390/ma12060999.

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Environmental protection is the major concern of any form of manufacturing industry today. As focus has shifted towards sustainable cooling strategies, minimum quantity lubrication (MQL) has proven its usefulness. The current survey intends to make the MQL strategy more effective while improving its performance. A Ranque–Hilsch vortex tube (RHVT) was implemented into the MQL process in order to enhance the performance of the manufacturing process. The RHVT is a device that allows for separating the hot and cold air within the compressed air flows that come tangentially into the vortex chamber

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Wang, Yu Fu, Yun Huang, Zhi Huang, and Liang Yi. "Belt Grinding of TC4 Based on the Technology of Cryogenic Mist Jet Combined MQL." Key Engineering Materials 416 (September 2009): 8–12. http://dx.doi.org/10.4028/www.scientific.net/kem.416.8.

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To solve the problems of the reduces in belt life、low in metal removal rate and environmental pollution by using conventional grinding fluid, a new high efficiency and green cooling technology—— The Technology Of Liquid Nitrogen Cryogenic Wind Jet Combined MQL(LNCWJCM), It was used in belt grinding of TC4. The effect of LNCWJCM on grinding performance of TC4 was analyzed to compare with cold air 、liquid nitrogen and conventional flood cooling method. The experimental results indicate that LNCWJCM can improve metal removal rate and the life of belt, in addition , impacting on abrasive belt grin

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Kieraś, Seweryn, Marek Jakubowski, and Krzysztof Nadolny. "Simulation Studies on Centrifugal MQL-CCA Method of Applying Coolant during Internal Cylindrical Grinding Process." Materials 13, no. 11 (2020): 2506. http://dx.doi.org/10.3390/ma13112506.

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This paper describes simulation studies regarding the application of the centrifugal minimum quantity lubrication (MQL) method simultaneously with the delivery of a compressed cooled air (CCA) stream in the internal cylindrical grinding process. The idea of a new hybrid cooling and lubrication method connecting centrifugal (through a grinding wheel) lubrication by MQL with a CCA stream is described. The methodology of computational fluid dynamics (CFD) simulation studies, as well as the results of numerical simulations, are presented in detail. The aim of the simulations was to determine the m

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Peng, Hai, and Qiang Wang. "Design and Simulation Analysis of Low Temperature Air Deep Hole Processing System." Key Engineering Materials 620 (August 2014): 154–59. http://dx.doi.org/10.4028/www.scientific.net/kem.620.154.

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In this paper, a unique design of low temperature of BTA deep-hole machining system based on the green manufacturing was proposed,in which the low temperature air cutting technology was applied to the BTA deep hole processing. Consequently, the system have the characteristics of low temperature air cutting and deep hole processing. The system presented here uses the large flow of cold air (-30 °C ~-20 °C) and oil mixing atomization gas (MQL) for chip removal, cooling and lubricating the tool, thus the use of deep hole cutting oil was decreased, the cooling and lubricating effect of the tool wa

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9

Peng, Hai, and Tong Li. "MQL Technology Including the BTA Deep Hole Drilling Machining." Advanced Materials Research 189-193 (February 2011): 3071–74. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3071.

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The traditional cast-type method of BTA deep-hole drilling(such as BTA or DF) has cutting fluid consumption of the existence of large, high production costs, pollution of the environment and endangering the health of the operator and other problems. In this paper, the MQL technology (minimum lubrication technology) is applied to the method of BTA deep-hole machining (ie, near-dry deep-hole processing), we also analyzed the function and effect of MQL machining cutting fluid. Through the near-dry deep-hole drilling experiment, we find that a water-soluble cutting fluid has good atomization effec

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10

Nadolny, Krzysztof, and Seweryn Kieraś. "Experimental Studies on the Centrifugal MQL-CCA Method of Applying Coolant during the Internal Cylindrical Grinding Process." Materials 13, no. 10 (2020): 2383. http://dx.doi.org/10.3390/ma13102383.

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This paper presents the results of experimental research concerning the possibility of supporting the cooling function during internal cylindrical grinding using the minimum quantity lubrication (MQL) method by additional delivery of a compressed cooled air (CCL) stream. The article presents a description of a hybrid method of cooling and lubrication of the grinding zone integrating centrifugal (through a grinding wheel) lubrication with the minimum quantity of lubricant and cooling with a compressed cooled air stream generated by a cold air gun (CAG). The methodology and results of experiment

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11

de Moraes, Douglas Lyra, José Claudio Lopes, Bruno Vicente Andrioli, et al. "Advances in precision manufacturing towards eco-friendly grinding process by applying MQL with cold air compared with cooled wheel cleaning jet." International Journal of Advanced Manufacturing Technology 113, no. 11-12 (2021): 3329–42. http://dx.doi.org/10.1007/s00170-021-06713-3.

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12

Lin, Shen Yung, and Z. K. Wang. "Investigation of Cutting Performance for NAK80 Hardened Steel under Different Assisted Machining Systems." Materials Science Forum 976 (January 2020): 133–38. http://dx.doi.org/10.4028/www.scientific.net/msf.976.133.

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In this study, five different assisted techniques, including without assistance, laser-assisted, flood assisted, MQL-assisted and cold air-assisted were employed for NAK80 mold steel milling. The 18 set experiments were performed in each assisted system but 27 sets were executed in the without assistance situation. Under each assisted milling circumstance, the effects of process parameters on the variations of surface roughness, cutting force, tool wear and surface morphology of the workpiece are thus investigated. Milling experiments of NAK80 mold steel by cutting-tool of extra-fine particle

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Saberi, A., A. R. Rahimi, H. Parsa, M. Ashrafijou, and F. Rabiei. "Improvement of surface grinding process performance of CK45 soft steel by minimum quantity lubrication (MQL) technique using compressed cold air jet from vortex tube." Journal of Cleaner Production 131 (September 2016): 728–38. http://dx.doi.org/10.1016/j.jclepro.2016.04.104.

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14

Park, Sungsu, Conway B. Leovy, and Margaret A. Rozendaal. "A New Heuristic Lagrangian Marine Boundary Layer Cloud Model." Journal of the Atmospheric Sciences 61, no. 24 (2004): 3002–24. http://dx.doi.org/10.1175/jas-3344.1.

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Abstract A new heuristic model of stratocumulus cloudiness in the inversion-capped marine boundary layer is developed and tested. The essential ingredient is a new method for predicting the statistical distribution of temperature and specific humidity at the inversion base under partially decoupled conditions along steady-state marine boundary layer (MBL) trajectories. MBL decoupling is parameterized as an increasing function of the height difference between the inversion base and lifting condensation level (LCL) of the mixed-layer air. Required inputs are sea surface temperature (SST), free a

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15

Palii, A. P., O. A. Naumenko, O. I. Shkromada, et al. "Investigation of the microclimate of poultry houses and chemical composition of poultry litter, depending on the time of its accumulation in the cage batteries." Ukrainian Journal of Ecology 9, no. 3 (2019): 272–79. http://dx.doi.org/10.15421/2019_90.

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One of the main reasons of the destabilization of the ecological environment around poultry farms is the widespread use of resource-consuming and environmentally irrational production processes and technological preparation, processing and disposal of poultry waste. Nowadays, cage batteries with a belt removal system are becoming more widespread in the poultry farming. However, the use of such equipment does not guarantee compliance with applicable veterinary and sanitary requirements for the content of harmful gases in the air of the poultry houses and its microbial contamination. This, in tu

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16

Pan, Yiwen, Yifan Li, Wei Fan, et al. "A Sea Trial of Air-Lift Concept Artificial Upwelling in the East China Sea." Journal of Atmospheric and Oceanic Technology 36, no. 11 (2019): 2191–204. http://dx.doi.org/10.1175/jtech-d-18-0238.1.

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AbstractArtificial upwelling (AU), as one of the geoengineering tools, has received worldwide attention because of its potential ability to actualize ocean fertilization in a sustainable way. The severe challenges of AU are the design and fabrication of a technologically robust device with structural longevity that can maintain the function in the variable and complex hydrodynamics of the upper ocean. In this work, a sea trial of an air-lift concept AU system driven by self-powered energy was carried out in the East China Sea (ECS; 30°8′14″N, 122°44′59″E) to assess the logistics of at-sea depl

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17

Zhai, W. D., M. H. Dai, B. S. Chen, et al. "Seasonal variations of sea–air CO<sub>2</sub> fluxes in the largest tropical marginal sea (South China Sea) based on multiple-year underway measurements." Biogeosciences 10, no. 11 (2013): 7775–91. http://dx.doi.org/10.5194/bg-10-7775-2013.

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Abstract. Based upon 14 field surveys conducted between 2003 and 2008, we showed that the seasonal pattern of sea surface partial pressure of CO2 (pCO2) and sea–air CO2 fluxes differed among four different physical–biogeochemical domains in the South China Sea (SCS) proper. The four domains were located between 7 and 23° N and 110 and 121° E, covering a surface area of 1344 × 103 km2 and accounting for ~ 54% of the SCS proper. In the area off the Pearl River estuary, relatively low pCO2 values of 320 to 390 μatm were observed in all four seasons and both the biological productivity and CO2 upt

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18

Lee, Xuhui, Steve Sargent, Ronald Smith, and Bert Tanner. "In Situ Measurement of the Water Vapor 18O/16O Isotope Ratio for Atmospheric and Ecological Applications." Journal of Atmospheric and Oceanic Technology 22, no. 5 (2005): 555–65. http://dx.doi.org/10.1175/jtech1719.1.

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Abstract In this paper a system for in situ measurement of H216O/H218O in air based on tunable diode laser (TDL) absorption spectroscopy is described. Laboratory tests showed that its 60-min precision (one standard deviation) was 0.21‰ at a water vapor volume mixing ratio of 2.67 mmol mol−1 (dewpoint temperature −10.8°C at sea level) and improved to 0.09 at 15.3 mmol mol−1 (dewpoint temperature 13.4°C). The TDL measurement of the vapor generated by a dewpoint generator differed from the equilibrium prediction by −0.11 ± 0.43‰ (mean ± one standard deviation). Its measurement of the ambient wate

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Zhai, W. D., M. H. Dai, B. S. Chen, et al. "Seasonal variations of air-sea CO<sub>2</sub> fluxes in the largest tropical marginal sea (South China Sea) based on multiple-year underway measurements." Biogeosciences Discussions 10, no. 4 (2013): 7031–74. http://dx.doi.org/10.5194/bgd-10-7031-2013.

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Abstract. Based upon fourteen field surveys conducted between 2003 and 2008, we showed that the seasonal pattern of sea surface partial pressure of CO2 (pCO2) and air–sea CO2 fluxes differed among four different physical-biogeochemical domains in the South China Sea (SCS) proper. The four domains were located between 4 and 23° N and 109 and 121° E, covering ~ 38% of the surface area of the entire SCS. In the area off the Pearl River Estuary, relatively low pCO2 values of 320 to 390 μatm were observed in all four seasons and both the biological productivity and CO2 uptake were enhanced in summe

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20

Borik, Mikhail, Galina Korableva, Alexey Kulebyakin, et al. "Phase Stability and Transport Properties of (ZrO2)0.91−x(Sc2O3)0.09(Yb2O3)x Crystals (x = 0–0.01)." Crystals 11, no. 2 (2021): 83. http://dx.doi.org/10.3390/cryst11020083.

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Phase stability and transport properties of (ZrO2)0.91−x(Sc2O3)0.09(Yb2O3)x crystals (x = 0–0.01) have been studied before and after air annealing at 1000 °C for 400 h. The crystals have been grown by radio frequency (RF) heating in a cold crucible. The microstructure, phase composition, and electrical conductivity of the crystals have been studied using optical microscopy, X-ray diffraction, Raman spectroscopy, and impedance spectroscopy. Phase stability and degradation of ionic conductivity of the crystals upon long-term high-temperature heat treatment have been discussed. We show that the s

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21

Mao, H., M. Chen, J. D. Hegarty, et al. "Seasonal climate and air quality simulations for the northeastern US – Part 1: Model evaluation." Atmospheric Chemistry and Physics Discussions 9, no. 5 (2009): 17851–901. http://dx.doi.org/10.5194/acpd-9-17851-2009.

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Abstract. Regional climate and air quality simulations were conducted for summers 2001–2005 in the eastern US and subjected to extensive evaluation using various ground and airborne measurements. Climate evaluation focused on transport by comparing modeled dominant map types with ones from reanalysis. Reasonable agreement was found for their frequency of occurrence and distinctness of circulation patterns. The two most frequent map types from reanalysis were the Bermuda High (22%) and passage of a Canadian cold frontal over the northeastern US (20%). The model captured their frequency of occur

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He, Ai Dong, Bang Yan Ye, and Zi Yuan Wang. "Experimental Effect of Cryogenic MQL Cutting 304 Stainless Steel." Key Engineering Materials 621 (August 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.621.3.

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Cryogenic MQL is a kind of green machining technology of the combination of cryogenic air and minimal quantity lubrication (MQL). The aim of this research is to determine if the cryogenic MQL technique in turning with Cutting tool with internal cooling structure gives some advantages in terms of tool life, surface roughness and cutting chip breaking. This paper reports the results obtained from turning tests, at one feed rates (0.12mm/r) and one depth of cut (0.4mm) and different cutting speeds (43m/min, 108m/min, 217m/min), and the results obtained show that using cryogenic MQL had some advan

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Yuan, Song Mei, S. Liu, and Wei Dong Liu. "Effects of Cooling Air Temperature and Cutting Velocity on Cryogenic Machining of 1Cr18Ni9Ti Alloy." Applied Mechanics and Materials 148-149 (December 2011): 795–800. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.795.

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This paper presents experimental investigations on influences of cooling air temperature, as well as cutting velocity, on performance in milling of the 1Cr18Ni9Ti alloy with coated cemented carbide inserts. Cutting force, tool wear and surface roughness are experimentally studied to compare the effects of different cooling air temperatures. The results showed that minimum quantity lubrication (MQL) with cooling air significantly reduces cutting force, tool wear. Three different cooling air temperatures are used to investigate the effects of cooling air temperature on the machinability characte

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Obikawa, Toshiyuki, and Y. Kamata. "MQL Cutting of Inconel 718 with a Super Lattice Coating Tool." Key Engineering Materials 291-292 (August 2005): 433–38. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.433.

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MQL (Minimum Quantity Lubrication) technology was applied to finish-turning of a nickel base superalloy, Inconel 718, with a PVD coated carbide tool with a super lattice coating of TiN/AlN. Cutting lubricant used for MQL was a biodegradable synthesis ester, which was supplied to the cutting point with compressed air from the both sides of flank and rake faces of the tool. At a cutting speed of 1.0 m/s and an air supply pressure of 0.4 MPa, MQL cutting showed longer tool life and better surface finish than both the dry cutting and wet cutting. When increasing the pressure of the air supply from

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Reid, J. S., N. D. Lagrosas, H. H. Jonsson, et al. "Observations of the temporal variability in aerosol properties and their relationships to meteorology in the summer monsoonal South China Sea/East Sea: the role of monsoonal flows, the Madden–Julian Oscillation, tropical cyclones, squall lines and cold pools." Atmospheric Chemistry and Physics Discussions 14, no. 14 (2014): 20521–84. http://dx.doi.org/10.5194/acpd-14-20521-2014.

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Abstract. In a joint NRL/Manila Observatory mission, as part of the 7 SouthEast Asian Studies program (7SEAS), a two-week, late September~2011 research cruise in the northern Palawan Archipelago was undertaken to observe the nature of southwest monsoonal aerosol particles in the South China Sea/East Sea (SCS/ES) and Sulu Sea region. Previous analyses suggested this region as a~receptor for biomass burning from Borneo and Sumatra for boundary layer air entering the monsoonal trough. Anthropogenic pollution and biofuel emissions are also ubiquitous, as is heavy shipping traffic. Here, we provide

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Reid, J. S., N. D. Lagrosas, H. H. Jonsson, et al. "Observations of the temporal variability in aerosol properties and their relationships to meteorology in the summer monsoonal South China Sea/East Sea: the scale-dependent role of monsoonal flows, the Madden–Julian Oscillation, tropical cyclones, squall lines and cold pools." Atmospheric Chemistry and Physics 15, no. 4 (2015): 1745–68. http://dx.doi.org/10.5194/acp-15-1745-2015.

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Abstract. In a joint NRL/Manila Observatory mission, as part of the Seven SouthEast Asian Studies program (7-SEAS), a 2-week, late September 2011 research cruise in the northern Palawan archipelago was undertaken to observe the nature of southwest monsoonal aerosol particles in the South China Sea/East Sea (SCS/ES) and Sulu Sea region. Previous analyses suggested this region as a receptor for biomass burning from Borneo and Sumatra for boundary layer air entering the monsoonal trough. Anthropogenic pollution and biofuel emissions are also ubiquitous, as is heavy shipping traffic. Here, we prov

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27

Yuan, Song Mei, Lu Tao Yan, Wei Dong Liu, and Qiang Liu. "Investigation of Machinability in Minimum Quantity Lubrication Milling of GH4169 Aerospace Superalloy." Applied Mechanics and Materials 34-35 (October 2010): 666–70. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.666.

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Due to environmental concerns and the coming legislations, pollution-free and eco-friendly minimum quantity lubrication (MQL) technology has become focus of attention in manufacture field. The MQL and cooling system in this work has been designed, fabricated and used. The cutting performance of MQL with cooling air compare with the conventional cooling method in milling of GH4169 aerospace superalloy is evaluated based on analysis of cutting force and surface finish. The effect of cutting parameters (depth of cut, feed rate) on machining performances is analyzed. The experimental results show

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Belomyttsev, M. Yu. "Generalized diagrams and equations of recrystallization of cold-deformed steel St." Izvestiya. Ferrous Metallurgy 62, no. 11 (2019): 879–86. http://dx.doi.org/10.17073/0368-0797-2019-11-879-886.

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The recrystallization processes in steel St.3 inthe ferrite state were studied. Samples with diameter of 8 mmand with height of 10 mmwere deformed by compression at 20 °Cfor 20 to 80 %, annealed at 400 – 735 °Cfor a period from 5 minutes to 10 hours, and cooled in the air. On the samples, the grain size was determined in longitudinal sections (with respect to the compression axis). After separation of the entire array of experimental data (degree of deformation ε, temperature T and time τ of annealing, grain size D) into 3 groups (no recrystallization, beginning and end of the primary recrysta

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Hegarty, J., H. Mao, and R. Talbot. "Winter- and summertime continental influences on tropospheric O<sub>3</sub> and CO observed by TES over the western North Atlantic Ocean." Atmospheric Chemistry and Physics 10, no. 8 (2010): 3723–41. http://dx.doi.org/10.5194/acp-10-3723-2010.

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Abstract. The distributions of tropospheric ozone (O3) and carbon monoxide (CO), and the synoptic factors regulating these distributions over the western North Atlantic Ocean during winter and summer were investigated using profile retrievals from the Tropospheric Emission Spectrometer (TES) for 2004–2006. Seasonal composites of TES retrievals, reprocessed to remove the influence of the a priori on geographical and seasonal structure, exhibited strong seasonal differences. At the 681 hPa level during winter months of December, January and February (DJF) the composite O3 mixing ratios were unif

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Lopes, José Claudio, Mateus Vinicius Garcia, Matheus Valentim, et al. "Grinding performance using variants of the MQL technique: MQL with cooled air and MQL simultaneous to the wheel cleaning jet." International Journal of Advanced Manufacturing Technology 105, no. 10 (2019): 4429–42. http://dx.doi.org/10.1007/s00170-019-04574-5.

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Wakabayashi, Toshiaki, Satoshi Suda, and Junichi Shibata. "Importance of MQL Media Composition in Near-Dry Machining of Aluminum." Key Engineering Materials 407-408 (February 2009): 329–32. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.329.

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MQL technique has been recognized as the most representative method of environmentally friendly near-dry machining. In machining of aluminum and its alloys, since they have highly adhesive characteristics, effective lubrication is often necessary and MQL machining sometimes finds difficulty. This paper therefore investigates the lubricating action of MQL media with various compositions in machining of aluminum. Detailed examination regarding the contents of carrier gases has demonstrated oxygen leads to the low cutting performance and its concentration in carrier gases has to be kept below the

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Barf, J., T. Walther, A. Steinecker, and W. Mader. "Exit Wave Reconstruction and Elemental Mapping of Twin Boundaries in the System Zno - Ga2O3." Microscopy and Microanalysis 7, S2 (2001): 290–91. http://dx.doi.org/10.1017/s1431927600027525.

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Polycrystalline ZnO was sintered with 5 mol.% Ga2O3 at 1350°C for lhour in air. Samples for transmission electron microscopy (TEM) were prepared by cold pressing, grinding, dimpling and Argon ion-milling.ZnO crystallizes in the hexagonal wurtzite structure. Bright field and dark field images reveal lamellar defect structures which are not observed in undoped ZnO. Electron diffraction shows that the lamellar regions consist of heavily twinned ZnO. The twin boundaries (TB) of both twin variants are parallel to lattice planes of type { }. Lattice images along reveal narrow planar twin boundaries

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dos Santos, Claudinei, R. C. Souza, Maria Helena F. V. Fernandes, Nuno A. F. Almeida, Flávia A. Almeida, and Rui F. Silva. "Effect of La₂O₃-Rich Glass Addition on Sintering of Zirconia Based Ceramics." Materials Science Forum 587-588 (June 2008): 104–8. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.104.

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In this study, the influence of La-rich glass addition and sintering conditions on the densification and mechanical properties of 3 mol.%Y2O3-stabilized tetragonal zirconia polycrystals (3Y-TZP) ceramics were evaluated. High-purity tetragonal ZrO2 powder stabilized with 3 mol.% Y2O3 and La2O3-Rich glass were used as starting powders. Two compositions, ZrO2 containing 5 and 10 wt.% of a La2O3-rich glass were studied in this work. The starting powders were mixed/milled by planetary milling, dried at 90°C for 24 hours, sieved through a 60 mesh screen and uniaxially cold pressed under 80 MPa. The

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Liu, Zhi Qiang, X. J. Cai, Ming Chen, and Qing Long An. "Selection of Minimum Quantity Lubrication (MQL) Parameters in Milling of Ti-6Al-4V." Advanced Materials Research 426 (January 2012): 139–42. http://dx.doi.org/10.4028/www.scientific.net/amr.426.139.

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Different parameters of Minimum Quantity Lubrication (MQL) system, including air pressure, oil quantity, nozzle position, might have different influences on the cutting force and the cutting temperature. This paper presents an experiment of end-milling titanium alloy with MQL system. The objective of the experiment is to investigate the influences of MQL parameters in milling of Ti-6Al-4V. The results of experiment show that there are different effects on the cutting force and the cutting temperature with different MQL parameters, which will help to select different parameters in the end-milli

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Lin, Wuyin, Minghua Zhang, and Norman G. Loeb. "Seasonal Variation of the Physical Properties of Marine Boundary Layer Clouds off the California Coast." Journal of Climate 22, no. 10 (2009): 2624–38. http://dx.doi.org/10.1175/2008jcli2478.1.

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Abstract Marine boundary layer (MBL) clouds can significantly regulate the sensitivity of climate models, yet they are currently poorly simulated. This study aims to characterize the seasonal variations of physical properties of these clouds and their associated processes by using multisatellite data. Measurements from several independent satellite datasets [International Satellite Cloud Climatology Project (ISCCP), Clouds and the Earth’s Radiant Energy System–Moderate Resolution Imaging Spectroradiometer (CERES–MODIS), Geoscience Laser Altimeter System (GLAS), and Cloud-Aerosol Lidar and Infr

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Zhou, Xiaoli, Pavlos Kollias, and Ernie R. Lewis. "Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign." Journal of Climate 28, no. 6 (2015): 2420–42. http://dx.doi.org/10.1175/jcli-d-14-00320.1.

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Abstract The recent ship-based Marine ARM GCSS Pacific Cross-Section Intercomparison (GPCI) Investigation of Clouds (MAGIC) field campaign with the marine-capable Second ARM Mobile Facility (AMF2) deployed on the Horizon Lines cargo container M/V Spirit provided nearly 200 days of intraseasonal high-resolution observations of clouds, precipitation, and marine boundary layer (MBL) structure on multiple legs between Los Angeles, California, and Honolulu, Hawaii. During the deployment, MBL clouds exhibited a much higher frequency of occurrence than other cloud types and occurred more often in the

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Mosleh, Mohsen, Khosro Shirvani, Sonya Smith, John Belk, and Gary Lipczynski. "A Study of Minimum Quantity Lubrication (MQL) by Nanofluids in Orbital Drilling and Tribological Testing." Journal of Manufacturing and Materials Processing 3, no. 1 (2019): 5. http://dx.doi.org/10.3390/jmmp3010005.

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In minimum quantity lubrication (MQL), an aerosol containing a minimum amount of the cutting fluid is delivered to the tool/workpiece interface during the metal cutting operation. The fluid lubrication by the fluid and the cooling by the compressed air in the aerosol improves the cutting process, while the low consumption rate in MQL provides less cleanup and reduces the associated cost. In this paper, molybdenum disulfide (MoS2) and hexagonal boron nitride (hBN) nanoparticles were added to the aerosol for providing a third functionality to the MQL, which is solid lubrication at the interface.

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Zhang, Guang J., Andrew M. Vogelmann, Michael P. Jensen, William D. Collins, and Edward P. Luke. "Relating Satellite-Observed Cloud Properties from MODIS to Meteorological Conditions for Marine Boundary Layer Clouds." Journal of Climate 23, no. 6 (2010): 1374–91. http://dx.doi.org/10.1175/2009jcli2897.1.

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Abstract This study examines 6 yr of cloud properties observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the NASA Terra satellite in five prominent marine boundary layer (MBL) cloud regions (California, Peru, Canary, Angola, and Australia) and investigates their relationships with near-surface meteorological parameters obtained from NCEP reanalyses. About 62 000 independent scenes are used to examine the instantaneous relationships between cloud properties and meteorological parameters that may be used for global climate model (GCM) diagnostics and parameterization.

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Shofiyandi, Wildan, and Heri Yudiono. "Perbedaan Distribusi Kekerasan Metode Minimum Quantity Lubrication (MQL) dan Metode Wet Machining Pada Material Al-Zn." Jurnal Dinamika Vokasional Teknik Mesin 5, no. 1 (2020): 42–50. http://dx.doi.org/10.21831/dinamika.v5i1.30994.

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This study aims to determine the influence of three different coolant delivery methods, namely dry machining, Minimum Quantity Lubrication (MQL), and wet machining. This is quantitative research with the use of experimental methods. Data were collected through observation. Data analysis techniques being used was descriptive statistics. In MQL methods, the use of coolant is minimized by mixing it with high-pressurized air. It is shown from the obtained data that the use of MQL methods is not as good as the wet machining. The hardness distribution of wet machining method is lower than the MQL. T

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Ren, C., A. R. MacKenzie, C. Schiller, G. Shur, and V. Yushkov. "Diagnosis of processes controlling water vapour in the tropical tropopause layer by a Lagrangian cirrus model." Atmospheric Chemistry and Physics 7, no. 20 (2007): 5401–13. http://dx.doi.org/10.5194/acp-7-5401-2007.

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Abstract. We have developed a Lagrangian air-parcel cirrus model (LACM), to diagnose the processes controlling water in the tropical tropopause layer (TTL). LACM applies parameterised microphysics to air parcel trajectories. The parameterisation includes the homogeneous freezing of aerosol droplets, the growth/sublimation of ice particles, and sedimentation of ice particles, so capturing the main dehydration mechanism for air in the TTL. Rehydration is also considered by resetting the water vapour mixing ratio in an air parcel to the value at the point in the 4-D analysis/forecast data used to

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PANNEWITZ, Stefan, T. G. Allan GREEN, Mark SCHLENSOG, Rod SEPPELT, Leopoldo G. SANCHO, and B. SCHROETER. "Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica." Lichenologist 38, no. 1 (2005): 67–81. http://dx.doi.org/10.1017/s0024282905005384.

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Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7·5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and

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Hegarty, J., H. Mao, and R. Talbot. "Winter- and summertime continental influences on tropospheric O<sub>3</sub> and CO observed by TES over the western North Atlantic Ocean." Atmospheric Chemistry and Physics Discussions 9, no. 6 (2009): 23211–69. http://dx.doi.org/10.5194/acpd-9-23211-2009.

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Abstract. The distribution of tropospheric O3 and CO and the regulating factors over the western North Atlantic Ocean during winter (December, January, and February, DJF) and summer (June, July, August, JJA) were investigated using retrievals from the Tropospheric Emission Spectrometer (TES) for 2004–2006. Seasonal composites of TES retrievals, reprocessed to remove the artificial geographic and seasonal structure added from the a priori, exhibited strong seasonal differences. At the 681 hPa level during winter composite O3 levels were uniformly low (~45 ppbv), but continental export was evide

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Weigel, Ralf, Christoph Mahnke, Manuel Baumgartner, et al. "In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone – Part 2: NPF inside ice clouds." Atmospheric Chemistry and Physics 21, no. 17 (2021): 13455–81. http://dx.doi.org/10.5194/acp-21-13455-2021.

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Abstract. From 27 July to 10 August 2017, the airborne StratoClim mission took place in Kathmandu, Nepal, where eight mission flights were conducted with the M-55 Geophysica up to altitudes of 20 km. New particle formation (NPF) was identified by the abundant presence of nucleation-mode aerosols, with particle diameters dp smaller than 15 nm, which were in-situ-detected by means of condensation nuclei (CN) counter techniques. NPF fields in clear skies as well as in the presence of cloud ice particles (dp > 3 µm) were encountered at upper troposphere–lowermost stratosphere (UTLS) levels and

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Mao, H., M. Chen, J. D. Hegarty, et al. "A comprehensive evaluation of seasonal simulations of ozone in the northeastern US during summers of 2001–2005." Atmospheric Chemistry and Physics 10, no. 1 (2010): 9–27. http://dx.doi.org/10.5194/acp-10-9-2010.

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Abstract. Regional air quality simulations were conducted for summers 2001–2005 in the eastern US and subjected to extensive evaluation using various ground and airborne measurements. A brief climate evaluation focused on transport by comparing modeled dominant map types with ones from reanalysis. Reasonable agreement was found for their frequency of occurrence and distinctness of circulation patterns. The two most frequent map types from reanalysis were the Bermuda High (22%) and passage of a Canadian cold frontal over the northeastern US (20%). The model captured their frequency of occurrenc

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Park, Ki Beom, Dong-Soo Shin, and Young Tae Cho. "Development and Performance Evaluation of Eco-Friendly POSS-Containing MQL Oil Coolant for Drilling Processes." Applied Sciences 10, no. 8 (2020): 2751. http://dx.doi.org/10.3390/app10082751.

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Drilling work on Inconel, a well-known super-heat-resistant alloy, requires a significant quantity of cutting oil to prevent heat-induced abrasion and damage to the cutting tool, caused by the strength and toughness of the alloy. This high requirement of cutting oil, however, negatively affects the processing environment; therefore, minimum-quantity lubrication (MQL), an eco-friendly cutting-oil-supply method, is attracting attention. The conventional MQL method, however, has the disadvantage that an oil-mist is produced along with high-pressure air; hence, the mist is scattered in the air, ma

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Handawi, Mohamed, Amad Elddein Issa Elshwain, Mohd Yusof Noordin, Norizah Redzuan, and Denni Kurniawan. "Comparison between Nitrogen-Oil-Mist and Air-Oil-Mist Condition when Turning of Hardened Tool Stainless Steel." Applied Mechanics and Materials 660 (October 2014): 18–22. http://dx.doi.org/10.4028/www.scientific.net/amm.660.18.

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Minimum quantity lubrication (MQL) or as it’s called semi dry cutting is a technique which spray a small value of lubricant flow rate to the cutting zone area. MQL has been used in many machining process with different cutting tools and workpiece materials due to its green environments and economically advantageous. MQL has become an attractive option to dry and flood cutting in terms of reduce the temperature in the cutting zone and reduce the cost of the product. However, in MQL seems to be machining limited by cutting temperature, because at high speed the effect of oil mist becomes evapora

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Kleinman, L. I., P. H. Daum, Y. N. Lee, et al. "Aerosol concentration and size distribution measured below, in, and above cloud from the DOE G-1 during VOCALS-REx." Atmospheric Chemistry and Physics Discussions 11, no. 6 (2011): 17289–336. http://dx.doi.org/10.5194/acpd-11-17289-2011.

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Abstract. During the VOCALS Regional Experiment, the DOE G-1 aircraft was used to sample a varying aerosol environment pertinent to properties of stratocumulus clouds over a longitude band extending 800 km west from the Chilean coast at Arica. Trace gas and aerosol measurements are presented as a function of longitude, altitude, and dew point in this study. Spatial distributions are consistent with an upper atmospheric source for O3 and South American coastal sources for marine boundary layer (MBL) CO and aerosol, most of which is acidic sulfate in agreement with the dominant pollution source

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Kleinman, L. I., P. H. Daum, Y. N. Lee, et al. "Aerosol concentration and size distribution measured below, in, and above cloud from the DOE G-1 during VOCALS-REx." Atmospheric Chemistry and Physics 12, no. 1 (2012): 207–23. http://dx.doi.org/10.5194/acp-12-207-2012.

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Abstract. During the VOCALS Regional Experiment, the DOE G-1 aircraft was used to sample a varying aerosol environment pertinent to properties of stratocumulus clouds over a longitude band extending 800 km west from the Chilean coast at Arica. Trace gas and aerosol measurements are presented as a function of longitude, altitude, and dew point in this study. Spatial distributions are consistent with an upper atmospheric source for O3 and South American coastal sources for marine boundary layer (MBL) CO and aerosol, most of which is acidic sulfate. Pollutant layers in the free troposphere (FT) c

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Taïbi-Benziada, Laldja, Hassiba Kermoun, and Yasmina Belaroussi. "Effects of 0.03MF₂ – 0.12LiF (M = Ca, Sr, Ba) on the Sintering and Dielectric Properties of SrTiO₃ Ceramics." International Journal of Engineering Research in Africa 9 (May 2013): 1–12. http://dx.doi.org/10.4028/www.scientific.net/jera.9.1.

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Cold-pressed pellets were prepared from the mixtures SrTiO3- 0.03MF2- 0.12LiF, M = Ca, Sr or Ba, then air-fired at 950 °C for 2 hours. The obtained samples were investigated by X-ray diffraction and scanning electron microscopy. Each ceramic is a perovskite single phase and the relative density reaches 95% for all ceramics. The addition of 3 mol. % of the eutectic composition 1MF2- 4LiF (Tm~ 760 °C) to SrTiO3lowers the sintering temperature of pure strontium titanate from 1400 °C to 950 °C and induces a strong modification in the SrTiO3cubic phase: superlattice reflections are detected and the

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Hara, A. H., and T. Y. Hata. "Residual Activity of Insecticides on Dendrobium for Control of Orchid Weevils, 1993." Arthropod Management Tests 19, no. 1 (1994): 369. http://dx.doi.org/10.1093/amt/19.1.369a.

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Abstract Bioassay tests were conducted from 10 Mar through 8 Apr (study 1) and 31 Aug through 22 Sep (study 2) at the University of Hawaii at Manoa, Waiakea Experiment Station in Hilo, HI. Established plants ‘Uniwai Supreme’ (study 1), and ‘Uniwai Pearl’ (study 2) growing in 0.5 inch crushed basalt rock under a Conley cold frame greenhouse (6 mil. clear FVG 3HLFI polyethylene film covering) were used in this study. Insecticides were applied once at 1,375 liters/ha using a compressed air sprayer with a 8004 Teejet nozzle at 40 psi. Sixteen leaves per treatment, 4 leaves per replicate, were remo

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