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Journal articles on the topic 'Electron heat engine'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ding, Zemin, Lingen Chen, and Fengrui Sun. "Ecological optimization of energy selective electron (ESE) heat engine." Applied Mathematical Modelling 35, no. 1 (January 2011): 276–84. http://dx.doi.org/10.1016/j.apm.2010.06.003.

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2

ZHANG, YAN-CHAO, JI-ZHOU HE, YU-LING XIAO, and HONG-NI LIANG. "A NANOTHERMOELECTRIC HEAT ENGINE WORKING WITH TWO-LEVEL QUANTUM SYSTEM." Modern Physics Letters B 28, no. 03 (January 23, 2014): 1450018. http://dx.doi.org/10.1142/s0217984914500183.

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In this paper, we establish a nanothermoelectric engine consisting of two discrete energy levels embedded between two reservoirs at different temperatures and chemical potentials. Based on master equation, the expressions for the power output and efficiency of the nanothermoelectric engine are derived. The characteristic curves between the power output and the efficiency are plotted. Moreover, the optimal performance parameters are obtained by the numerical calculation. The influence of the strength of variations in electron–electron interactions on the optimal performance parameters is analyz

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3

Wang, HaiLong, Hui Pan, and RongMing Wang. "Quantum heat engine cycle working with a strongly correlated electron system." Science China Physics, Mechanics and Astronomy 55, no. 5 (March 16, 2012): 792–97. http://dx.doi.org/10.1007/s11433-012-4678-9.

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4

Su, Shanhe, Juncheng Guo, Guozhen Su, and Jincan Chen. "Performance optimum analysis and load matching of an energy selective electron heat engine." Energy 44, no. 1 (August 2012): 570–75. http://dx.doi.org/10.1016/j.energy.2012.05.044.

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5

Ding, ZeMin, LinGen Chen, YanLin Ge, and ZhiHui Xie. "Optimal performance regions of an irreversible energy selective electron heat engine with double resonances." Science China Technological Sciences 62, no. 3 (December 10, 2018): 397–405. http://dx.doi.org/10.1007/s11431-018-9357-5.

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6

Strangman, T. E., and J. L. Schienle. "Tailoring Zirconia Coatings for Performance in a Marine Gas Turbine Environment." Journal of Engineering for Gas Turbines and Power 112, no. 4 (October 1, 1990): 531–35. http://dx.doi.org/10.1115/1.2906200.

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Zirconia coatings represent an advanced materials technology that offers significant durability and performance benefits for marine gas turbines. Thin zirconia coatings offer superior resistance to hot corrosion attack from fuel (sulfur, vanadium, and sodium) and air (sea salt) impurities present in marine engine environments. Thicker zirconia coatings reduce transient thermal stresses and heat transferred into air-cooled components. This paper describes the development of zirconia coatings, applied by the electron beam evaporation-physical vapor deposition process, that are tailored to provid

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7

Huang, Jiang Lin, Jean Christophe Gebelin, Richard Turner, and Roger C. Reed. "A Process Model for Electron Beam Welding with Variable Thickness." Materials Science Forum 762 (July 2013): 538–43. http://dx.doi.org/10.4028/www.scientific.net/msf.762.538.

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A process model for electron beam (EB) welding with a variable thickness weld joint has been developed. Based on theoretical aspects and experimental calibration of electron beam focusing, welding parameters including beam power, focus current, working distance and welding speed were formulated in the heat source model. The model has been applied for the simulation of assembly of components in a gas turbine engine compressor. A series of metallographic weld sections with different welding thickness were investigated to validate the predicted thermal results. The workpieces were scanned both pr

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8

Ding, Zemin, Lingen Chen, and Fengrui Sun. "Performance optimization of a total momentum filtered energy selective electron (ESE) heat engine with double resonances." Mathematical and Computer Modelling 54, no. 9-10 (November 2011): 2064–76. http://dx.doi.org/10.1016/j.mcm.2011.05.015.

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9

Ding, ZeMin, LinGen Chen, and FengRui Sun. "Modeling and performance analysis of energy selective electron (ESE) engine with heat leakage and transmission probability." Science China Physics, Mechanics and Astronomy 54, no. 11 (September 12, 2011): 1925–36. http://dx.doi.org/10.1007/s11433-011-4473-z.

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10

Yu, Youhong, Zemin Ding, Lingen Chen, Wenhua Wang, and Fengrui Sun. "Power and efficiency optimization for an energy selective electron heat engine with double-resonance energy filter." Energy 107 (July 2016): 287–94. http://dx.doi.org/10.1016/j.energy.2016.04.006.

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11

Cai, Kun, Zhen Zhang, Na Wang, Yu Hu, and Fengshan Wang. "Effect of the MoSi2 coating on operational reliability of bipropellant rocket engine." E3S Web of Conferences 260 (2021): 03003. http://dx.doi.org/10.1051/e3sconf/202126003003.

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This present study investigated the MoSi2 coating and its effect on reliability of bipropellant rocket engine. This coating is developed to protect the chamber substrate material form oxidization under hightemperature oxidative circumstance as bipropellant engine works. The multilayer structure of the MoSi2 coating shows excellent high-temperature and thermal-cycle resistance. Its characteristic of self-healing leads to the good performance under the long-time steady working condition for rocket engines. A 25000-seconds firing test was conducted to testify the performance of MoSi2 coating unde

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12

Zhu, Dongming, and Robert A. Miller. "Thermal-Barrier Coatings for Advanced Gas-Turbine Engines." MRS Bulletin 25, no. 7 (July 2000): 43–47. http://dx.doi.org/10.1557/mrs2000.123.

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Ceramic thermal-barrier coatings (TBCs) have received increasing attention for gasturbine engine applications. The advantages of using TBCs include increased fuel efficiency by allowing higher gas temperatures and improved durability and reliability from lower component temperatures. As illustrated in Figure 1, TBCs can provide effective heat insulation to engine components, thus allowing higher operating temperatures and reduced cooling requirements. Atypical two-layer TBC system consists of a porous ZrO2-Y2O3 ceramic top coat and an oxidation-resistant metallic bond coat. These TBC systems c

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13

Luo, Xiaoguang, Jizhou He, Kailin Long, Jun Wang, Nian Liu, and Teng Qiu. "A theoretical study on the performances of thermoelectric heat engine and refrigerator with two-dimensional electron reservoirs." Journal of Applied Physics 115, no. 24 (June 28, 2014): 244306. http://dx.doi.org/10.1063/1.4885295.

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14

Markovsky, Pavlo E. "Application of Local Rapid Heat Treatment for Improvement of Microstructure and Mechanical Properties of Titanium Products." Key Engineering Materials 436 (May 2010): 185–94. http://dx.doi.org/10.4028/www.scientific.net/kem.436.185.

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Local Rapid Heat Treatment (LRHT) based on induction-heating methods can be used to form unique location-specific microstructures and properties in commercial titanium alloys while maintaining the bulk of the material in an initial, non-heat-treated condition. The present work is focused on practical aspects of LRHT application for microstructure/ mechanical properties improvement of some parts made of commercial titanium alloys. It is shown, that LRHT application could improve mechanical properties of such complicated part like turbine engine compressor blades, and two made of Ti-6Al-4V and V

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15

Saikawa, Seiji, Manabu Mizutani, and Nozomu Kawabe. "Effect of Sn Content on Heat Resistance of Mg-3%Al-1%Si Alloy for Casting." Materials Science Forum 941 (December 2018): 1071–76. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1071.

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Magnesium alloys have the characteristic with high specific strength and lightweight property, it is widely used for auto mobile industry. Heat-resistant magnesium alloy is focused as a suitable material for weight reduction of the engine and power train parts in automotive field. In this study, microstructure and heat-resistant property in Mg-3mass%Al-1mass%Si (Mg-3%Al-1%Si) alloy with containing large amount of Sn (tin) were investigated. The alloys produced by permanent mold casting were investigated by optical microscope (OM), scanning electron microscopy (SEM) and measuring of bolt load r

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16

Reed, R. C., H. J. Stone, S. M. Roberts, and J. M. Robinson. "The development and validation of a model for the electron beam welding of aero-engine components." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 211, no. 6 (June 1, 1997): 421–28. http://dx.doi.org/10.1243/0954410971532785.

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Electron beam welding is used to manufacture high-integrity structures, for example compressor assemblies, for the latest generation of Rolls-Royce aero-engines. For such applications, the welding variables (for example welding current, voltage, beam focusing parameters) must be optimized, such that any distortion induced by the process is insignificant when compared to the dimensional tolerances allowed by the designers. Furthermore, the residual stresses induced by the process must be described and characterized, since these are required for estimates of component life. A model for such elec

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17

Qi, Hong Yu, Jian Xie, Shao Lin Li, and Xiao Guang Yang. "Mechanical Properties of Forged Ti-6Al-4V Structure by Electron Beam Welding." Advanced Materials Research 455-456 (January 2012): 308–13. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.308.

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The blisk (bladed disk) is a new structural component of the modern aero-engine and plays an important role in improving its performance. Ti-6Al-4V alloy joints welded by electron beam have been widely used for compressor blisk in advanced aero engine. It is necessary to analyze microstructure and mechanical properties of Ti-6Al-4V welded structure by electron beam welding (EBW) for failure analysis and structure design of blisk. Microstructure of Ti-6Al-4V welded structure by EBW was investigated by microscopic observation and micro indentation testing. Experiment results show grain coarsenin

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18

Urbahs, Alexanders, and Konstantins Savkovs. "Features of Creating Nanostructured Intermetallic T_i-Al-S_i-C_r Coatings for the Hot Section Part of Gas Turbine Engines." Key Engineering Materials 799 (April 2019): 52–58. http://dx.doi.org/10.4028/www.scientific.net/kem.799.52.

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The paper deals with the results of a research study into Ti-Al-Si-Cr-based thin heat resistant ion-plasma coatings for titan alloy-based parts of a gas turbine engine (GTE). The research involved the use of three Ti-Al-Si-Cr-based alloys – intermetallic, with different Cr-Ti priority. The analysis of surface oxidation process in the range of 600-850°C with the help of scanning electron microscopy was performed, and the key features of coating fracture process under high-temperature oxidation conditions were identified.

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19

Xiao, Min, Cheung Poon, Priti Wanjara, Mohammad Jahazi, Zouheir Fawaz, and P. Krimbalis. "Optimization of Nd:YAG-Laser Welding Process for Inconel 718 Alloy." Materials Science Forum 546-549 (May 2007): 1305–8. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.1305.

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Ni-based superalloys are extensively used in the manufacture of aircraft engine components because of their excellent heat-resistant and corrosion-resistant properties. The principal joining processes for Ni-based superalloys are TIG welding, MIG welding, submerged arc welding, electron beam welding, and CO2 laser welding. In this investigation, a robotic 4-kW continuous-wave Nd:YAG laser system was used to identify the optimal laser welding process for 2.0 mm thick Inconel (IN) 718 sheets. The effect of various processing parameters, which included power input, welding speed, weld geometry an

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20

Luo, Xiaoguang, Cong Li, Nian Liu, Ruiwen Li, Jizhou He, and Teng Qiu. "The impact of energy spectrum width in the energy selective electron low-temperature thermionic heat engine at maximum power." Physics Letters A 377, no. 25-27 (October 2013): 1566–70. http://dx.doi.org/10.1016/j.physleta.2013.04.045.

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21

Dong, Jun, Weili Wang, Xiaofeng Wang, Shaojun Qiu, Maohua Du, Bo Tan, Yanjing Yang, and Taizhong Huang. "Influences of Multilayer Graphene and Boron Decoration on the Structure and Combustion Heat of Al3Mg2 Alloy." Nanomaterials 10, no. 10 (October 13, 2020): 2013. http://dx.doi.org/10.3390/nano10102013.

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To improve the engine-driven performance of propellants, high-energy alloys such as Al and Mg are usually adopted as annexing agents. However, there is still room for improvement in the potential full utilization of alloy energy. In this study, we investigated how to improve combustion efficiency by decorating Al3Mg2 alloy with multilayer graphene and amorphous boron. Scanning electron microscopy and Raman tests showed that decorating with multilayer graphene and amorphous boron promoted the dispersion of Al3Mg2 alloy. The results showed that decorating with 1% boron and 2% multilayer graphene

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22

Papadimitriou, Ioannis, Claire Utton, and Panos Tsakiropoulos. "Phase Equilibria in the Nb-Rich Region of Al-Nb-Sn at 900 and 1200 °C." Materials 12, no. 17 (August 28, 2019): 2759. http://dx.doi.org/10.3390/ma12172759.

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The Al-Nb-Sn phase diagram was studied experimentally in the Nb-rich region to provide important phase equilibria information for alloy design of Nb-silicide based materials for aero engine applications. Three alloys were produced: Nb-17Al-17Sn, Nb-33Al-13Sn and Nb-16Al-20Sn (at.%). As-cast and heat-treated alloys (900 and 1200 °C) were analysed using XRD (X-ray diffraction) and SEM/EDS (scanning electron microscopy/ electron dispersive x-ray spectroscopy). Tin showed a high solubility in Nb2Al, reaching up to 21 at.% in the Sn-rich areas, substituting for Al atoms. Tin and Al also substituted

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23

Sakthinathan, Ganapathy, Raju Saravanan, and Chandrasekaran Uthirapathy. "Thermal characteristics of yttria stabilized zirconia nanolubricants." Thermal Science 16, no. 2 (2012): 481–87. http://dx.doi.org/10.2298/tsci1202481s.

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The transition from microparticles to nanoparticles can lead to a number of changes in its properties. The objective of this work is to analyze the thermal, tribological properties of yttria stabilized zirconia nanoparticles. Nanosized yttria stabilized zir conia particles were prepared by milling the yttria stabilized zirconia (10 ftm) in a planetary ball mill equipped with vials using tungsten carbide balls. After 40 hours milled the yttria stabilized zirconia nanoparticles of sizes ranging from 70-90 nm were obtained. The phase composition and morphologies of the assynthesized particles wer

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24

Wei, Li Jun, Bo Long Li, Liu Yi Guan, Tong Bo Wang, Peng Qi, and Zuo Ren Nie. "Influence of Die Casting Temperature and T1 Treatment on the Microstructure and Properties of the Alsicumg Alloy." Materials Science Forum 877 (November 2016): 127–31. http://dx.doi.org/10.4028/www.scientific.net/msf.877.127.

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Al-Si alloy was widely applied in automobile engine parts to realize weight reduction. The influence of casting temperature on the microstructure of die casting Al-Si-Cu-Mg alloy was studied in this paper. Based on ZL 101 alloy, the strength was improved with addition of 0.8% Cu element. The influence of pouring temperature on microstructure was investigated using optical microscope and electron probe micro-analysis (EPMA), and T1 heat treatment was optimized. The primary α-Al was more coarsened when the pouring temperature rose from 660 ̊C to 690 ̊C. The solid solubility of Cu in α-Al was 0.2

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25

Monteiro, Waldemar A., and Ingrid A. Dos Santos. "Microstructural evolution of a nickel-based superalloy." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 936–37. http://dx.doi.org/10.1017/s0424820100177817.

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Superalloys are indispensable for the superior perfomance and efficien of jet engine turbine disks,turbine blades,combustors,roket shells and many other devices and components used in various industries, in Cluding nuclear, space and aeronautics.Over the last thirty years,nickel-base superalloys has undergone more structural studies than any other superalloy as a result of attempts to correlate its properties to microstructure and heat treatment. To avoid contradictory or inconsistent findings, it is also necessary a carefully microstructural observation of the employed starting materials. In

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26

Uzunonat, Yagiz. "Investigation of Impact Behavior of TIG Welded Inconel 718 at Aircraft Engine Operating Temperatures." Materials Science Forum 890 (March 2017): 339–43. http://dx.doi.org/10.4028/www.scientific.net/msf.890.339.

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In this work, Charpy notch pendulum impact test was performed on non-welded and TIG (Tungsten Inert Gas) welded Inconel 718 specimens at three different temperatures as 20°C, 500°C and 700°C. After the completion of tests, SEM (Scanning Electron Microscopy) inspection and EDX (Energy-Dispersive X-Ray Spectroscopy) analysis were performed for the microstructural examination of the specimens. Hardness measurements on the rupture zone of selected welded and non-welded specimens were also performed to make a better approach to interpretation of the impact behavior of material. Inspections indicate

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27

Chmiela, B., B. Kościelniak, and J. Cwajna. "Effect of hot isostatic pressing on the microstructure of turbine blade airfoil made of nickel-base superalloy." Archives of Metallurgy and Materials 62, no. 1 (March 1, 2017): 241–45. http://dx.doi.org/10.1515/amm-2017-0036.

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Abstract Turbine blades are flight safety parts in the jet engine. Therefore they should be characterized by very good mechanical properties, especially high creep resistance and fatigue strength at high temperature. The mechanical properties of blades made of nickel-based superalloys depend on the microstructure of the casting and its porosity [1,2]. The aim of this paper is evaluation of effect of hot isostatic pressing (HIP) on microstructure of blade airfoil made of IN713C superalloy in four important zones: (i) leading edge, (ii) trailing edge, (iii) suction side and (iv) pressure side. H

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28

Park, K., and C. Sung. "Characterization of SiC fiber-reinforced SiC composites by TEM." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 632–33. http://dx.doi.org/10.1017/s042482010017089x.

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SiC fiber-reinforced SiC composites have been accepted to have considerable potential as an engineering structural ceramic for numerous high-temperature applications, such as various heat engine components. In this study, the microstructure of matrix, fiber, and matrix/fiber interface of SiC fiber (SCS-6, Textron)-reinforced nitrogen-treated SiC composites was characterized using transmission electron microscopy (TEM). Cross-sectional TEM samples were prepared by mechanical grinding, dimpling, and ion-milling. The samples were analyzed using a Philips EM400T TEM and a Noran ultrathin window Mi

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29

Alhummiany, H. "Novel Nanofluid Based on Water-Loaded Delafossite CuAlO2 Nanowires: Structural and Thermal Properties." Journal of Nanomaterials 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/4076960.

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Ultra-high cooling performance is a crucial requirement of many thermomechanical systems, such as microelectronic devices, engine cooling systems, nuclear power systems, chemical reactors, and refrigeration systems. Recent experimental results reveal the potential thermal properties of suspended nanometallics in conventional fluids. In this study, the facile synthesis of one-dimensional delafossite CuAlO2 nanowires by microwave hydrothermal treatment was presented. A novel type of nanofluid consisting of CuAlO2 nanowires suspended in distilled water at various volume fractions (0.0, 0.2, 0.4,

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30

Lu, Yu Heng, Cai Min Huang, and Jian Min Zeng. "Diffusion Study of Al-8%Si Alloy Double-Coating on Steel." Advanced Materials Research 189-193 (February 2011): 1080–84. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1080.

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Al-8%Si alloy double-coating on Q235 steel were produced, Then the samples were executed diffusion at high temperatures protecting with flowing argon gas. Scanning electron microscope (SEM), optical microscope (OM), and energy dispersive X-ray spectroscope (EDS) were employed for microstructure observation of cross-sectional, surface and compositional analysis of coating. The diffusion mathematical model was established with the finite element method. The results show that good quality Al-8%Si coating is made; after heat-diffusion treatment, the new phases FeAl and Fe3Al presents; Silicon atom

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31

Graboś, Adrian, Jan Huebner, Paweł Rutkowski, Shenghua Zhang, Yen-Ling Kuo, Dariusz Kata, and Shigenari Hayashi. "Microstructure and Hardness of Spark Plasma Sintered Inconel 625-NbC Composites for High-Temperature Applications." Materials 14, no. 16 (August 16, 2021): 4606. http://dx.doi.org/10.3390/ma14164606.

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The study focuses on obtaining Inconel 625-NbC composites for high-temperature applications, e.g., jet engines, waste-to-energy combusting systems or gas engine turbines, and characterizing them in terms of their microstructure and hardness improvement. Synthesis was performed utilizing Spark Plasma Sintering (SPS) at 1150 °C under the load of 45 MPa in medium vacuum (under 10−3 MPa) for a total time of 60 min. Four sets of samples with different Inconel 625 to NbC weight ratios were prepared (5, 10, 20, and 30 wt.%), followed by a reference sample containing no ceramic reinforcement. Obtained

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32

Frutos-Myro, Enrique, Ian MacLaren, Peifeng Li, Iain Berment-Parr, and Mathew Thomas. "Nano-scale characterisation of tri-modal microstructures in TIMETAL® 575." MATEC Web of Conferences 321 (2020): 12025. http://dx.doi.org/10.1051/matecconf/202032112025.

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TIMETAL® 575, developed by Titanium Metals Corporation (TIMET), is a high strength forgeable α+β titanium alloy with comparable density, beta transus temperature and processing characteristics to Ti-6Al-4V but with enhanced static and fatigue strength primarily aimed at aero-engine disc or blade applications. Recent research on this alloy has focussed on microstructure evolution as a means to optimise mechanical behaviour and it has been concluded that a solution heat treatment followed by an ageing step yields a resulting “tri-modal” microstructure, consisting of equiaxed primary α and bi-lam

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33

Veerasamy Shamprasshaath, Shaisundaram, Chandrasekaran Manoharan, Hemalatha Krishnaraj, and Martin Lazar. "Thermal barrier coating using yttria stabilized zirconia by plasma spray technique." Thermal Science, no. 00 (2021): 156. http://dx.doi.org/10.2298/tsci201027156v.

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This paper deals with the tribological behavior of thermal barrier coating in engine liner andit also deals with the quality of thermally treated coating. Multilayer structure formed from topcoat and bond coat which was deposited on the same type of steel substrates, in which heat treatments may improve the mechanical properties of materials both substrate and coating and enhance their hardness for many cases of ceramics through recrystallization of microstructures. In addition, heat treatments will introduce residual stresses by different thermal contractions and lattice misfits because of mi

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34

Kianicová, Marta, and Jan Kafrik. "A Study of Hot Corrosion Behaviour of NiAl Coatings in an Aggressive Environment." Solid State Phenomena 226 (January 2015): 177–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.226.177.

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The microstructure and corrosion behaviour was studied for a diffusionβ-NiAl and Si modifiedβ-NiAl coatings formed on the superalloy MAR-M 247. First type,β-NiAl coating was applied with the help of method “out-of-pack”. Second type, Si modifiedβ-NiAl coating was applied by method “pack-cementation”. Diffusion coatings created protective, heat-activated layer which separated superalloy from aggressive environment. Corrosive environment was created by tablets Na2SO4at 900°C. Technique of scanning electron microscopy/energy dispersive X-ray analysis (SEM/EDS) was used to characterize the corrosi

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35

Barbieri, Giuseppe, Francesco Cognini, Vincenzo Bonaiuto, Roberto Montanari, Maria Richetta, and Alessandra Varone. "Laser Beam Welding of IN792 DS Superalloy." Materials Science Forum 941 (December 2018): 1149–54. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1149.

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The main purpose of the investigation is to develop reliable methods to repair IN 792 superalloy components by Laser Beam Welding (LBW). The jet engine structural components made of nickel-base superalloys are subjected to high stresses and severe environmental, therefore crack may occurs during in-service life. Considering the high cost of this components they are often repaired by welding. Welds must be made: (i) by altering as little as possible the original microstructure; (ii) without introducing in the molten (MZ) and heat affected (HAZ) zones relevant residual stresses; (iii) without pr

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36

Ziaja, Waldemar, Maciej Motyka, Krzysztof Kubiak, and Jan Sieniawski. "Cyclic creep behaviour of two-phase Ti-6Al-2Mo-2Cr alloy." MATEC Web of Conferences 321 (2020): 11079. http://dx.doi.org/10.1051/matecconf/202032111079.

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One of the important criteria for selection titanium alloys for discs and blades of turbine engine compressor is their fatigue and creep strength at room and elevated temperature. Fatigue and creep properties of two-phase titanium alloys show strong dependence on microstructure, especially morphology of the α and β phases which can be controlled to certain extent by proper selection of hot working and heat treatment conditions. Quantitative description of two-phase titanium alloys behaviour under loading and environmental conditions leading to combined creep and fatigue processes has been alwa

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37

Hall, Ernest L., Ann M. Ritter, and Nathan Lewis. "Microstructural analysis of fiber coatings and reaction zones in Ti-14Al-21Nb/SiC composites." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 198–99. http://dx.doi.org/10.1017/s0424820100174126.

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Titanium and titanium aluminide fibrous composites are currently under consideration for use in aircraft engine and other applications, and their fabrication, microstructure, and properties are under active investigation. These composites can exhibit enhanced strength relative to the unreinforced matrix alloy, but ductilities are often limited, especially at room temperature. This limited ductility may be related to the formation of brittle reaction zones between the fiber and the matrix during fabrication, heat treatment, or use. In this study, the reaction zones formed during fabrication of

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38

Özkan, Doğuş, and Cenk Türküz. "Chromium nitride-coated copper beryllium as a cam tappet material candidate." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 15 (May 21, 2020): 3030–46. http://dx.doi.org/10.1177/0954406220927055.

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Copper beryllium (CuBe) with good mechanical and high electrical conductivity properties is used in metalworking, electronic devices, automotive systems, and aerospace systems. Having low hardness limits its usage in tribosystems such as internal combustion engine valve train systems. In this study, heat-treated CuBe material was coated with CrN under a micron thickness by cathodic arc physical vapor deposition (arc-PVD) to improve wear resistance not only at unlubricated condition but also at the lubricated condition for tribosystem, especially a material candidate for cam tappets. Therefore,

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39

Swadźba, Lucjan, Ginter Nawrat, Boguslaw Mendala, and Marek Goral. "The Influence of Deposition Process on Structure of Platinum-Modifed Aluminide Coatings O Ni-Base Superalloy." Key Engineering Materials 465 (January 2011): 247–50. http://dx.doi.org/10.4028/www.scientific.net/kem.465.247.

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The modern jet engines used in commercial and military aircrafts are characterized by operating temperature in turbine section above 1000oC. The Ni-base superalloy turbine blades and vanes working in high temperature in very aggressive environment require using of protective coatings. The aluminide coatings are widely used to protect this engine parts. The pack cementation, out of pack and chemical vapour deposition (CVD) technologies are usually used to produce this type of coating. The aluminide coatings can be modified by platinum or other elements. The Pt-modified aluminide coatings are ch

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Belan, Juraj, Alan Vaško, Lenka Kuchariková, and Eva Tillová. "The fractography analysis of IN718 alloy after three-point flexure fatigue test." MATEC Web of Conferences 157 (2018): 07001. http://dx.doi.org/10.1051/matecconf/201815707001.

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In this study, the high cycle fatigue (HCF) properties of IN718 superalloy with given chemical composition were investigated at three-point flexure fatigue test at room temperature. INCONEL alloy 718 is nickel-chromium-iron hardenable alloy and due to its unique combination of mechanical properties (high-strength; corrosion-resistant and so on) used for production of heat resistant parts of aero jet engine mostly. Mechanical properties of this alloy are strongly dependent on microstructure and on presence of structural features such are principal strengthening phase gamma double prime, gamma p

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Peng, Li Ming, Bin Hu, and Wen Jiang Ding. "Mechanical Properties, Aging Behavior and Microstructure Evolution of Mg-Nd-Zn-Zr Based Magnesium Matrix Composite Reinforced with Alumina Fibers." Materials Science Forum 706-709 (January 2012): 687–92. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.687.

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Metal matrix composites reinforced with discontinuous reinforcement (short fiber, whisker or particle) are attractive for applications requiring higher stiffness and strength than traditional alloys. Unlike continuously reinforced composites, where the properties are mainly influenced by fibers, the properties of the discontinuously reinforced composites seem to be influenced more by matrix properties. Most of the discontinuously reinforced composites are based on age-hardenable light alloys, so that aging treatments can be applied to develop the optimum properties of the composites. The aging

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Guo, Zi Xu, Xiao Yu Qin, Da Wei Huang та Xiao Jun Yan. "Morphology Evolution and Probability Characteristic of γ' Phase in Single Crystal Superalloy during Creep Rafting". Key Engineering Materials 827 (грудень 2019): 373–78. http://dx.doi.org/10.4028/www.scientific.net/kem.827.373.

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Ni-based single crystal (SC) superalloys are widely applied in the turbine blades of advanced aero-engine due to their excellent heat resistance. Rafting is a major degradation mode of SC under creep damage. In this study, the morphology evolution and probability characteristic of shape parameters are investigated for cuboidal γ´ phase during creep rafting. Three groups of SC creep tests are carried out at 850 °C and 600 Mpa along [001] direction. Scanning electron microscope (SEM) is used to observe the microstructure of SC at four different creep times including 0 h, 8 h, 16 h and 64 h. In a

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Klochikhin, V., S. Danilov, N. Lysenko та V. Naumyk. "Development of technology for modification of heat-resistant nickel alloy ЖС3ДК-ВІ with titanium carbonitride ultrafine powders". Innovative Materials and Technologies in Metallurgy and Mechanical Engineering, № 2 (18 березня 2021): 37–44. http://dx.doi.org/10.15588/1607-6885-2020-2-5.

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Purpose. To study the effect of modification by the titanium carbonitride Ti(C, N) ultrafine particles additives in the form of powder and briquettes on the structure and physical-mechanical properties of the ЖС3ДК-ВІ alloy used for the manufacture of aircraft engine turbines cast rotor blades. Research methods. Preliminary high-temperature treatment of the melt was carried out on a VIP-10 installation. On the UPPF-3M installation with the alkaline melting pot, the ЖС3ДК-ВІ alloy was modified with ultrafine particles of titanium carbonitride Ti(C,N) in an amount of 60...80 g in the

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Dejima, Kazuhito, Osamu Nakabeppu, Yuto Nakamura, Tomohiro Tsuchiya, and Keisuke Nagasaka. "Three-point MEMS heat flux sensor for turbulent heat transfer measurement in internal combustion engines." International Journal of Engine Research 20, no. 7 (April 18, 2018): 696–705. http://dx.doi.org/10.1177/1468087418770308.

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A heat flux sensor was developed with micro-electro-mechanical systems (MEMS) technologies for investigating turbulent heat transfer characteristics in engines. The sensor has three thin-film resistance temperature detectors (RTDs) of a square 315 µm on a side on a 900 µm diameter circle in rotational symmetry. The performances of the MEMS systems sensor were tested in an open combustion chamber and a laboratory engine. In the open chamber tests, it was revealed that the MEMS sensor can measure the wall heat fluxes reflecting flow states of gas phase. In addition, the noise was evaluated as 3.

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Winterbone, D. E. "Engines versus electrons: The future of power production." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 214, no. 1 (February 1, 2000): 1–11. http://dx.doi.org/10.1243/0957650001537804.

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The demands for energy are increasing as countries become richer, and if all mankind achieved the per capita energy consumption of the United States then the total energy consumption of the world would rise by a factor of about 4.5. This would make a large demand on fuel supplies and probably increase pollution beyond a sustainable level. This paper examines the limits to the theoretical efficiency of power generation, including both heat engines and fuel cells, and demonstrates that thermal efficiencies of above 60 per cent are achievable in each case if combined plants are used. It is shown

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Muttahar, Moch Iqbal Zaelana, Shinta Virdhian, Purbaja Adi Putra, Dagus Resmana Djuanda, Eva Afrilinda, and Amsal Genesar. "Mechanical Properties Enhancement of Al-Si-Cu-Fe Alloy Through Aging Treatment Variations." Metalurgi 35, no. 3 (December 28, 2020): 105. http://dx.doi.org/10.14203/metalurgi.v35i3.571.

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Al-Si alloys are being widely used as main engine components replacing iron in several parts in the automotive industry. Some of its mechanical properties were a reference in its alloy utilization. In this research, the heat treatment carried out on the specimen included solid solution treatment and the artificial aging process for aluminium alloys. Test pieces were heated on the furnace with a solid solution treatment process at 540 ° C with holding time around 5 hours and quenched at 60 °C with water quenchant, followed by 3 different aging treatment which included single-stage aging, artifi

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Cardoso, Marlon José, Milton Luiz Polli, and Giuseppe Pintaude. "Wear analysis of PVD-coated twist drills under MQL." Industrial Lubrication and Tribology 70, no. 9 (November 19, 2018): 1664–69. http://dx.doi.org/10.1108/ilt-10-2016-0243.

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Purpose Deep drilling of hardened steels is a difficult machining operation because of the high wear level of tools. This paper aims to present the main wear mechanisms observed in physical vapor deposition (PVD)-coated twist drills during deep drilling of SAE4144M steel under minimum quantity lubrication, assessed in the production of injection holders. Design/methodology/approach Two PVD coatings were tested: TiAlN and AlCrN, industrially processed, the last one being a multilayer coating. The workpiece was heat treated for a hardness of 39 HRC to be applied in a diesel engine component. The

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Diazdelacruz, Jose, and Miguel Martin-Delgado. "Quantum Information Remote Carnot Engines and Voltage Transformers." Entropy 21, no. 2 (January 30, 2019): 127. http://dx.doi.org/10.3390/e21020127.

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A physical system out of thermal equilibrium is a resource for obtaining useful work when a heat bath at some temperature is available. Information Heat Engines are the devices which generalize the Szilard cylinders and make use of the celebrated Maxwell demons to this end. In this paper, we consider a thermo-chemical reservoir of electrons which can be exchanged for entropy and work. Qubits are used as messengers between electron reservoirs to implement long-range voltage transformers with neither electrical nor magnetic interactions between the primary and secondary circuits. When they are a

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Морозова, Ирина Владимировна, та Юрий Матвеевич Терещенко. "Удосконалення процесу сумішоутворення в камерах згоряння теплових двигунів". Aerospace technic and technology, № 4sup2 (27 серпня 2021): 29–34. http://dx.doi.org/10.32620/aktt.2021.4sup2.04.

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Improving the mixture formation and combustion of various types of fuels in the combustion chamber is one the ways for the development of modern engines. Requirements for reliability, durability, tactical and technical characteristics and, importantly, for environmental friendliness pose new problems in this area of science and technology. This is largely determined by the degree of perfection individual processes in the engine operating cycle. An increase in power in accordance with the requirements for an increase in energy saturation and productivity of transport vehicles is limited by the

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Mishra, Nibedita, Pranab K. Mohapatra, and Mukesh K. Raval. "In Silico Design of a Single Protein Molecular Photoreaction Center." Micro and Nanosystems 12, no. 2 (August 19, 2020): 112–21. http://dx.doi.org/10.2174/1876402911666190719111104.

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Background: Research on harvesting solar energy through an artificial photosynthetic device is gaining momentum in the present era. The device is a promising solution to the energy crisis by overcoming the crunch in fossil fuel and low efficiency of heat engine. Reports are available on design of isolated parts of the photosynthetic device, for example, only sensitizer or only redox unit containing metallo-peptides. Objective: An attempt has been made to design an in silico photoreaction center in a single chain protein matrix containing all the three basic units: sensitizer, electron donor, a

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