Journal articles: '950'

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Wiss, Adam, Keaton Smetana, and Casey May. "950." Critical Care Medicine 47 (January 2019): 454. http://dx.doi.org/10.1097/01.ccm.0000551699.37901.44.

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McCluskey, J., J. Cassidy, J. Martin, and J. Gray. "ABSTRACT 950." Pediatric Critical Care Medicine 15 (May 2014): 210. http://dx.doi.org/10.1097/01.pcc.0000449676.01625.fe.

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Lotz, W. "Fall 950." DMW - Deutsche Medizinische Wochenschrift 107, no. 06 (2009): e23-e24. http://dx.doi.org/10.1055/s-0029-1236710.

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Wittek, Peter. "Algorithm 950." ACM Transactions on Mathematical Software 41, no. 3 (2015): 1–12. http://dx.doi.org/10.1145/2699464.

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Ghadir, S., S. Sarajari, D. Hill, A. DeCherney, H. Danzer, and M. Surrey. "P-950." Fertility and Sterility 86, no. 3 (2006): S486. http://dx.doi.org/10.1016/j.fertnstert.2006.07.1343.

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Chorney, Maureen P., Kunal Mondal, Jerome P. Downey, and Prabhat K. Tripathy. "On the Sintering Behavior of Nb2O5 and Ta2O5 Mixed Oxide Powders." Materials 15, no. 14 (2022): 5036. http://dx.doi.org/10.3390/ma15145036.

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A mixed oxide system consisting of Nb2O5 and Ta2O5, was subjected to annealing in air/hydrogen up to 950 °C for 1–4 h to study its sintering behavior. The thermogravimetric–differential scanning calorimetry (TGA–DSC) thermograms indicated the formation of multiple endothermic peaks at temperatures higher than 925 °C. Subsequently, a 30% Ta2O5 and 70% Nb2O5 (mol%) pellet resulted in good sintering behavior at both 900 and 950 °C. The scanning electron microscope (SEM) images corroborated these observations with necking and particle coarsening. The sintered pellets contained a 20.4 and 20.8% mixed oxide (Nb4Ta2O15) phase, along with Ta2O5 and Nb2O5, at both 900 and 950 °C, indicating the possibility of the formation of a solid solution phase. In situ high-temperature X-ray diffraction (XRD) scans also confirmed the formation of the ternary oxide phase at 6 and 19.8% at 890 and 950 °C, respectively. The Hume–Rothery rules could explain the good sintering behavior of the Ta2O5 and Nb2O5 mixed oxides. An oxide composition of 30% Ta2O5 and 70% Nb2O5 (mol%) and a sintering temperature of 950 °C appeared adequate for fabricating well-sintered oxide precursors for subsequent electrochemical polarization studies in fused salts.

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Jin, Xing, and Tai-Shung Chung. "Thermal decomposition behavior of main-chain thermotropic liquid crystalline polymers, Vectra A-950, B-950, and Xydar SRT-900." Journal of Applied Polymer Science 73, no. 11 (1999): 2195–207. http://dx.doi.org/10.1002/(sici)1097-4628(19990912)73:11<2195::aid-app17>3.0.co;2-3.

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Rabehevitra, David. "950. XYLOOLAENA PERRIERI." Curtis's Botanical Magazine 37, no. 3 (2020): 281–87. http://dx.doi.org/10.1111/curt.12342.

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Fritz, Gerhard. "950 Jahre Backnang." Backnanger Jahrbuch 25 (January 25, 2024): 71–80. http://dx.doi.org/10.53458/bjb.v25i.9853.

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Jeni, Asni Mulyati, Made Sumadiyasa, and Ida Bagus Made Suryatika. "Pengaruh Suhu Sintering terhadap Pembentukan Senyawa Gd0,95La0,05Ba1,95Sr0,05Cu3O7-?" BULETIN FISIKA 24, no. 1 (2021): 10. http://dx.doi.org/10.24843/bf.2023.v24.i01.p02.

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Research has been conducted variations in sintering temperature between 900 ºC – 950 ºC for 12 hours on the synthesis phase of Gd1Ba2Cu3O7-d substituted La and Sr with stoichiometric composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. This study is intended to find out at what temperature the compound Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d can be formed to the maximum. Samples with composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d made from the raw materials Gd2O3, La2O3, BaO, Sr2O3 and CuO. Samples are synthesized using solid-state reaction method by wet mixing with nitric acid (HNO3) as solvent. The sample is sintering in the form of pellets in the furnace without annealing of oxygen gas. The synthesis results were characterized by X-Ray Diffraction (XRD) and analyzed with the Match-3 Program. By using the Entry number 96-153-9606, the results of it analysis showed that sintering temperature had an impact on the formation of phase compounds Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. Show that the volume fraction is increases with increasing of the sintering temperature, especially from temperatures of 930 ºC to 950 ºC. The highest volume fraction of 75,4263 % was obtained in samples that sintering at 950 ºC. Refinement results with Rietveld analysis method showed phase Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d formed is in orthorhombic symmetry. The volume of cell units is likely to increase as the temperature increases.

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Chung, Tai-Shung, Kui Xiang Ma, and Mike Jaffe. "Experimental and theoretical estimations of surface tensions for commercial liquid crystalline polymers, VectraTM A-950, B-950 and XydarTM SRT-900." Macromolecular Chemistry and Physics 199, no. 6 (1998): 1013–17. http://dx.doi.org/10.1002/(sici)1521-3935(19980601)199:6<1013::aid-macp1013>3.0.co;2-4.

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Mustofa, Salim, M. Dani, Parikin Parikin, et al. "HRPD and TEM Study of P/M 58Fe17Cr25Ni Austenitic Stainless Steel Synthesized by Spark Plasma Sintering." Acta Metallurgica Slovaca 28, no. 4 (2022): 224–29. http://dx.doi.org/10.36547/ams.28.4.1548.

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58Fe17Cr25Ni austenite stainless steel has been fabricated using metal powder through sintering with a spark plasma at temperatures of 900 and 950°C for 5 minutes. High purity Fe, Ni and Cr powders were used as materials for this steel. Before sintering, the powder was mixed in a milling equipment which was processed for 5 hours, then it is formed into a coin by pressing it under a load of 25 tons. High resolution powder neutron diffractometer was used for identifying the crystal structure in the 58Fe17Cr25Ni austenitic stainless steel. The sintering process at temperatures of 900C and 950°C generally forms microstructure having matrix of equiaxed austenite grains, with a crystal structure of face-centered cubic which included in the Fm3m space group. Some particles with high Cr content, a'-Cr, are distributed in all austenite grains. The austenite grains seen in the 58Fe17Cr25Niaustenitic stainless steel sintered at 900°C are twin grains. Dislocations, slip planes and bands are also existed in those grains. These defects are expected to decrease with increasing sintering temperatures up to 950° C. This change was followed by the appearance of air bubbles and sub-grains as the dominant sub-structures in the 58Fe17Cr25Ni austenitic stainless steel sintered at 950°C.

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Liu, Qing Shan, Bo Long Li, Tong Bo Wang, Cong Cong Wang, Peng Qi та Zuo Ren Nie. "Microstructure Evolution of near α Titanium Alloy during Multi-Step Thermomechanical Deformation Process". Materials Science Forum 1035 (22 червня 2021): 305–11. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.305.

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A new type of near α high temperature titanium alloy of Ti-Al-Sn-Zr-Mo-Si-Er was studied. The samples with different primary α phase content were prepared by solid solution at 950 °C/1 h—1010 °C/1 h. The multi-step hot compression experiments were carried out by Gleeble-3500 in a sequence of upper region of α + β phase, then followed by lower region of α + β phase. The effects of primary α phase content and deformation temperature on the microstructure of the alloy were studied by means of true stress-strain curve and optical microscope. The results show that the content of primary α phase gradually decreases from 45.4% at 950°C to 0% at 1010°C. As the deformation temperature decreases from 940°C to 900°C, the content of α phase increases gradually from 65% to 94%, which is changed from dynamic recrystallization to deformed structure elongated along RD direction. It is found that the arrangement of α phase along RD direction is the longest at 920°C. With the increase of the deformation temperature in the multi-step high temperature region from 970°C to 990°C, the width of deformed α phase decreases from 3.64 μm at 970°C to 2.71 μm at 990°C. The optimized microstructure is composed of 20% primary α phase arranged along RD direction. This process has a certain potential in the process of hot deformation of the alloy. Key words: high temperature titanium alloy, primary α phase, multi-step hot deformation

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Hermans, H. E. G. M. "950 Wat Mij Opvalt …" Zorg en Financiering 5, no. 7 (2007): 1–2. http://dx.doi.org/10.1007/bf03092774.

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Езубченко, И. С., М. Я. Черных, А. А. Андреев, Ю. В. Грищенко, И. А. Черных та М. Л. Занавескин. "Гетероструктуры на основе нитрида галлия на подложках кремния для мощных СВЧ-транзисторов". Российские нанотехнологии 14, № 7-8 (2020): 77–80. http://dx.doi.org/10.21517/1992-7223-2019-7-8-77-80.

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Предложен и реализован уникальный метод формирования гетероструктур на основе нитрида галлия на подложках кремния при пониженных температурах роста (менее 950°С). Сформированная гетероструктура обладает атомарно-гладкой поверхностью со средней квадратичной шероховатостью 0.45 нм и высоким кристаллическим качеством. Среднее слоевое сопротивление канала двумерного электронного газа составило 415 Ом/квадрат при концентрации электронов 1.65 · 1013 см–2 и подвижности 920 см2 /В · с. Максимальная величина тока насыщения стока для транзисторов с шириной затвора 1.2 мм составила 930 мА/мм, что соответствует лучшим мировым результатам для нитрид-галлиевых транзисторов на подложках кремния.

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Lawrence, David. "Pratyabhijñā Apoha Theory, Shannon–Weaver Information, Saussurean Structure, and Peircean Interpretant Agency." Religions 9, no. 6 (2018): 191. http://dx.doi.org/10.3390/rel9060191.

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This paper builds upon my earlier studies in interpreting interculturally how the Kashmiri nondual Śaiva thinkers Upaladeva (c. 900–950 CE) and Abhinavagupta (c. 950–1020 CE) in their Pratyabhijñā philosophical theology respond to and reinterpret the Buddhist semantic theory of reference as the exclusion of the inapplicable (anyāpoha). It engages the issues in the Pratyabhijñā debate with the Buddhists, with the interrelations of Claude Shannon and Warren Weaver’s theory of Information, Saussurean structuralist semiotics, and Peircean pragmatic semiotics.

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Obiko, Japheth, Chown Lesley, David Whitefield, and Michael Bodunrin. "A Physical Simulation of Heat Affected Zone of Creep Resistant Steel: Microstructure and Mechanical Properties Analysis." Key Engineering Materials 917 (April 13, 2022): 54–62. http://dx.doi.org/10.4028/p-5yh8p2.

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The structural integrity of ASTM P92 steel welded joints is of concern due to the Type IV cracking associated with the heat-affected zone (HAZ). Two HAZ treatments were done on P92 steel using a Gleeble® 3500 thermo-mechanical simulator at 900°C (intercritical HAZ) and 950°C (fine-grained HAZ). Followed by post-weld heat treatment (PWHT) of the samples in two sets:: a conventional PWHT at 760°C for 2 hours followed by air cooling; or re-austenitisation at 1050°C for 40 minutes then air cooling, followed PWHT. After conventional PWHT, the HAZ simulated at 950°C had the lowest toughness (108J) than the base metal (130J). After the heat treatments, samples that underwent a 900°C HAZ simulation had higher Charpy toughness (improved from 130-208 ± 6J) and lower hardness (decreased from 234.4-222.3HV0.5) than those at 950°C. The microstructures had lath martensite with differing precipitate densities depending on the thermal treatment. Keywords: P92 steel, heat affected zone, post-weld heat treatment, precipitates

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Sabir, Asmeati, Hammada Abbas, Ahmad Yusran Aminy, and Sapta Asmal. "Analysis of duck eggshells as hydroxyapatite with heat treatment method." EUREKA: Physics and Engineering, no. 4 (July 30, 2022): 16–24. http://dx.doi.org/10.21303/2461-4262.2022.002017.

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Duck eggshell contains very high calcium, making it a raw material for hydroxyapatite (HA) biomedical applications. The aim of this study was to synthesize natural HA from duck eggshell waste using cleaning, drying, smoothing with a smoothness level of passing is 200 meshes and heat treatment with temperature variations of 850 ºC, 900 ºC, and 950 ºC for one hour. The resulting HA material was characterized using X-ray fluorescence (XRF), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results of the physical characteristics of raw duck eggshells without heat treatment are white, slightly bluish in color, the smell and level of smoothness is smooth. However, heated powdered duck eggshells which are heated 950 °C are whiter than the samples which are heated at 850 ºC and 900 ºC, they have no odor and their smoothness is the smoothest. The small peaks of HA from the non-heat duck eggshell powder were 64.89 % with a CaCO3 of 23.50 %, then the peak of CaO increased along with the increasing of heat treatment temperature of 900 °C that result HA in 69.31 % and reduce CaCO3 in 19.44 %. Duck egg shell powder achieved the highest diffraction with the increasing formation of HA at a heat 950 ºC by 91.87 % with a very significant decrease of CaCO3 in 2.25 %. The XRF test results of duck eggshell powder showed that the chemical composition of CaO was 99.50 %, with elemental calcium (Ca) of 99.71 %. The FTIR test results on mesh 200 observed a reduction in the intensity of CaCO3 absorption, while the intensity of CaO at 364.55 cm-1 was getting stronger, which indicated the formation of CaO at 950 °C. This showed that the CaO formation at a temperature of 950 ºC was much more than the formation at a lower temperature. The deformation from the CaO to HA phase was close to perfect with 91.87 % hydroxylapatite

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Li, Zhuang, Di Wu, Wei Lv, Zhen Zheng, and Shao Pu Kang. "Research on Austenite Static Recrystallization Kinetics of Ultra-High Strength Dual Phase Steel." Advanced Materials Research 631-632 (January 2013): 310–13. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.310.

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In this paper, double deformation test was conducted in a MMS-300 thermomechanical simulator. Austenite static recrystallization kinetics of ultra-high strength dual phase steel was investigated. The results have shown that the softening fractions increase with holding time as a whole. Under deformation temperatures of 950°C, 1000°C and 1050°C, the softening fractions increase with the increase of the deformation temperature. And the softening curve appears relatively flat under deformation temperatures of 950°C. The austenite no-recrystallization temperature (Tnr) of ultra-high strength dual phase steel was between 900°C and 950°C. Double deformation test conditions which promoted Nb(CN) precipitation resulted in a decrease of a austenite recrystallization. Strain induced precipitation of Nb (CN) was the main reason why the softening curve appeared a plateau.

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Айваз, Сафие Ипек. "Growth kinetics and microstructure of iron boride layers on AISI 1050 steel." Металловедение и термическая обработка металлов, no. 12 (January 4, 2024): 18–24. http://dx.doi.org/10.30906/mitom.2023.12.18-24.

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Исследована кинетика диффузии бора в стали AISI 1050 (сталь 50). Проведено борирование стали в течение 2, 4 и 6 ч при 850, 900 и 950 °C с использованием порошка Экабор-II (Ekabor-II) методом пакетного борирования. На поверхности образцов получены боридные слои FeB/Fe2B толщиной 25,4 – 118,9 мкм. Сформированные боридные слои имеют типичную зубчатую морфологию и твердость 1071 – 1460 HV0,1. Рассчитанные по результатам диффузионно-кинетических исследований константы скорости роста боридного слоя для стали AISI 1050 при температурах борирования 850, 900 и 950 °C составляют 1,522 ' 10 – 12; 2,964 ' 10 – 13 и 6,354 ' 10 – 12 м2 ' с – 1 соответственно. Определена энергия активации диффузии бора в стали AISI 1050, равная 162,93 кДж ' моль – 1.

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27

Chung, Tai-Shung, Kui Xiang Ma, and Mike Jaffe. "Experimental and theoretical estimations of surface tensions for commercial liquid crystalline polymers, Vectra™ A-950, B-950 and Xydar™ SRT-900." Macromolecular Chemistry and Physics 199, no. 6 (1998): 1013–17. http://dx.doi.org/10.1002/macp.1998.021990612.

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Töpfer, J., S. Bierlich, S. Barth, B. Pawlowski, F. Bechtold, and J. M¨ller. "Z-, Y- and M-type Hexagonal Ferrites for High-Frequency Inductive Multilayer Devices." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, CICMT (2011): 000177–81. http://dx.doi.org/10.4071/cicmt-2011-wa21.

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Hexagonal ferrites can be used as soft magnetic materials for multilayer inductors for high frequency applications up to 3 GHz. We report on the preparation, thermal stability and magnetic properties of Z-, Y- and M-type hexagonal ferrites. Co2Z-type ferrite Ba3Co2Fe24O41 and iron excess Ba3Co2−yFe24+yO41 (0 ≤ y ≤ 0.8) were prepared by the mixed oxide route. Single phase Z-type ferrites were obtained after sintering at 1300°C. The permeability of a sample with y = 0.6 sintered at 1300°C is μ = 30 with a resonance frequency of 1 GHz. The addition of Bi2O3 as sintering aid shifts the maximum shrinkage down to 950°C and dense samples were sintered at 950°C; however, their permeability is only μ = 3…5. It is shown that Co2Z ferrites are not stable under LTCC conditions. Cu-substituted Z-type ferrites Ba3Co2-xCuxFe24O41 exhibit enhanced sintering ability, but sintering at 950°C also results in low permeability. Y-type hexagonal ferrites Ba2Co2−x−yZnxCuyFe12O22 were prepared at 1100°C and a permeability of μ = 20 was found for x = 1.2 and y = 0.8. Samples with Bi2O3 addition were sintered at 950 and 900°C exhibiting a permeability of μ = 10. Similar values were measured for M-type ferrites BaFe12-2yCoyTiyO19 with y = 1.2 which were sintered at 900°C using additives. Co/Ti co-substitution is an essential prerequisite for tailoring the magneto-crystalline anisotropy. Co/Ti- substituted M-type materials are stable under LTCC conditions. Ferrite multilayer devices were fabricated by screen printing coils onto ferrite tapes, stacking and lamination. Firing was performed between 1300°C and 900°C, i.e. at HTCC and LTCC conditions, respectively. The inductance behavior of the devices was evaluated and modeled. It is shown that hexagonal ferrites are suitable materials for the high-frequency multilayer inductors; however, Y- and M-type ferrites are preferred for LTCC-type inductors cofired at 900°C with Ag metallization.

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Jongbloed, Hein H. "Immed „von Kleve“ (um 950)." Annalen des Historischen Vereins für den Niederrhein 209, no. 1 (2006): 13–44. http://dx.doi.org/10.7788/annalen.2006.209.1.13.

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Stephenson, Paul. "Byzantium Transformed, c. 950-1200." Medieval Encounters 10, no. 1-3 (2004): 185–210. http://dx.doi.org/10.1163/1570067043077788.

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Jaeger, C. Stephen. "Philosophy, ca. 950–ca. 1050." Viator 40, no. 1 (2009): 17–40. http://dx.doi.org/10.1484/j.viator.1.100343.

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Abdul Razak, Rafiza, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin, Khairul Nizar Ismail, D. Hardjito, and Zarina Yahya. "Mechanical Properties of Artificial Lightweight Geopolymer Aggregate (ALGA) Concreteusing Volcano Mud with Various Sintering Temperature." Applied Mechanics and Materials 754-755 (April 2015): 279–83. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.279.

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The mechanical propertiesof artificial lightweight geopolymer aggregate (ALGA) using volcano mud in concrete have been investigated at various sintering temperature. The volcano mud was mixed with alkaline activator, formed into spherical pellets, then sintered in the furnace at temperature of 500°C, 600°C, 700°C, 800°C, 900°C, 950°C, and 1000 °C. The lightweight concrete with density below than 1800 kg/m3can be achieved at sintering temperature ALGA of 950 °C. The optimum compressive strength of 30.1 MPa was achieved at 28 days of testing. The lower water absorption of ALGA concrete was produced with 5-8 % in range.

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Navarro, Alexandre Guida. "O período Epiclássico na Mesoamérica: implicações para a questão tolteca e o sítio arqueológico de Chichén Itz." Varia Historia 24, no. 40 (2008): 533–50. http://dx.doi.org/10.1590/s0104-87752008000200013.

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A Arqueologia de Chichén Itzá sugere que sua construção data fundamentalmente do período Clássico Terminal ou Epiclássico (700-950 d.C.), ao invés do Pós-Clássico Inicial (950-1100 d.C.). Esta afirmação chama a atenção para as implicações de cronologia para o muito conhecido problema tolteca. Estamos trabalhando com a premissa que a ocupação de Chichén Itzá é, em sua maior parte, anterior à fase Tollán de Tula (900-1200 d.C.), o que nos leva a crer que o que geralmente é identificado como iconografia tolteca e, portanto, de origem das terras altas centro-mexicanas, de fato data do horizonte Epiclássico.

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Mukhtarov, Shamil Kh, and Farid Z. Utyashev. "Superplastic Behavior of ATI 718Plus Superalloy." Materials Science Forum 838-839 (January 2016): 557–62. http://dx.doi.org/10.4028/www.scientific.net/msf.838-839.557.

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Complex shaped, ultra thin-walled parts can be manufactured using superplastic forming. Hot working temperature for the production of fine-grained billets (d=5-15 μm) out of ATI Allvac 718Plus® superalloy is in the range of 982-1038°C. An ultrafine-grained structure (d=0.3 μm) was produced by multi-axial forging with a gradual decrease of the forging temperature from 950 to 700°C. Superplastic properties of the alloy were carried out in the temperature interval of 700-950°C. It has been revealed that the fine-grained alloy provided superplastic elongations about 300% at 950°C and strain rate of 10-4 s-1. The highest elongation of ultrafine-grained alloy was about 1450% and very low flow stresses were reached at 900°C and strain rate of 3×10-4 s-1. The ultrafine-grained alloy showed superplastic properties also at 700°C (0.62Tm). The microstructure and superplastic properties of the alloys 718 and 718Plus are compared.

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CARREIRO, Adriana da Fonte Porto, Ricardo Faria RIBEIRO, Osvaldo Luiz BEZZON, and Maria da Gloria Chiarello de MATTOS. "Avaliação da fundibilidade de uma liga de cobalto-cromo." Revista de Odontologia da Universidade de São Paulo 13, no. 2 (1999): 119–25. http://dx.doi.org/10.1590/s0103-06631999000200004.

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Neste trabalho propusemo-nos a avaliar a fundibilidade de uma liga de cobalto-cromo (VERA-PDI) em função da utilização de três revestimentos: Knebel (aglutinado por sílica), Termocast e Wirovest (aglutinados por fosfato) e duas temperaturas de aquecimento para o molde (900°C e 950°C). Para a execução do teste foi utilizado o método descrito por HINMAN et al.9 (1985). O método de fundição foi o de cera perdida sob chama de gás-oxigênio. Os dados obtidos foram submetidos a análise estatística e demonstraram não haver diferença estatisticamente significante para os revestimentos Knebel e Wirovest, e diferença estatisticamente significante ao nível de 0,1% para o revestimento Termocast quando da variação da temperatura de aquecimento do molde. Quando analisamos os revestimentos sob temperatura do molde de 900°C verificamos diferença estatisticamente significante entre Knebel e Termocast e Knebel e Wirovest ao nível de 0,1%, e diferença entre Termocast e Wirovest ao nível de 5%. Para a temperatura de 950°C houve diferença estatisticamente significante ao nível de 0,1% entre todos os revestimentos. Dentro dos parâmetros utilizados neste estudo pudemos concluir que, para a liga VERA-PDI, a utilização do revestimento Knebel e temperatura de aquecimento do molde de 950°C proporcionaram melhores resultados quanto à fundibilidade.

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Wang, Yao Ning, Xi Cheng Zhao, and Hong Zhou Ma. "High Temperature Deformation Mechanical Model and Processing Map of Ti-6Al-2Zr-1Mo-1V Alloy." Advanced Materials Research 199-200 (February 2011): 1988–92. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1988.

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Based on the high temperature compression simulation experiments, the mechanical behavior of Ti-6AI-2Zr-1Mo-1V alloy were studied over the range of temperature from 850°C to 1100°C , strain rate from 0.01 to 10s-1. The results show that the flow stress reduces with temperature increasing at the constant strain rate and increases rapidly with strain rate increasing at the constant temperature. The stress index n and deformation activation energy Q is respectively 7.0874 and 610.463 kJ/mol at 850-950°C . While at 950-1100°C , n is 4.7324 and Q is 238.030 kJ/mol. From the obtained processing map, it is found that two unstable regions present at the lower temperature or higher strain rate and two optimum regions in hot deformation process. The unstable zones are 850-950°C , 0.001-0.008s-1of strain rate, and 940-1030°C , 2-10s-1of strain rate respectively. In the optimum zone with the temperature range of 1060-1100°C , strain rate of 0.05-0.65s-1, and the peak efficiency of power dissipation of about 0.42; while in the other zone with the deformation temperature 890-940°C , strain rate of 0.06-0.18s-1, and the peak efficiency of power dissipation of about 0.33.

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37

Braswell, Geoffrey E., Iken Paap, and Michael D. Glascock. "THE OBSIDIAN AND CERAMICS OF THE PUUC REGION: CHRONOLOGY, LITHIC PROCUREMENT, AND PRODUCTION AT XKIPCHE, YUCATAN, MEXICO." Ancient Mesoamerica 22, no. 1 (2011): 135–54. http://dx.doi.org/10.1017/s0956536111000113.

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AbstractArchaeologists working in the northern Maya lowlands have faced persistent problems in establishing chronological precision and accuracy. In particular, it has proven difficult to create multi-phase chronologies for the Late and Terminal Classic periods. Investigators at Xkipche, a small Puuc site southwest of Uxmal, have employed both seriation and the typological approach to ceramic chronology. The results of the ceramic seriation suggest great persistence from the second century untila.d.1100, a continuity that is not supported by the Type-Variety approach to chronology. This report begins by reviewing the ceramic data, and then turns to another archaeological material, obsidian. Procurement patterns and production technology are discussed for the 182 obsidian artifacts collected during the first five seasons of the Projekt Xkipche. These data are compared with similar information gleaned from other sites in the northern Maya lowlands. Results of this obsidian analysis conflict with the absolute chronology proposed for the Xkipche ceramic sequence. Finally, a compromise ceramic chronology is proposed, one that is consistent with both obsidian and architectural data. This proposed chronology divides the seemingly monolithic Cehpech ceramic complex into three phases: Early Cehpech (a.d.550–700); Late Cehpech (a.d.700–900/950); and, Terminal Cehpech/Sotuta (a.d.900/950–950/1000).

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38

Kang, Jiajie, Mingzheng Wang, Wen Yue, et al. "Tribological Behavior of Titanium Alloy Treated by Nitriding and Surface Texturing Composite Technology." Materials 12, no. 2 (2019): 301. http://dx.doi.org/10.3390/ma12020301.

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This study experimentally investigated the effect of surface textures on the tribological mechanism of nitrided titanium alloy (Ti–6Al–4V). The titanium alloy samples were nitrided at various temperatures ranging from 750 to 950 °C for 10 h in a plasma nitriding furnace. Then, surface textures were fabricated on the polished titanium alloy and plasma nitrided samples by laser process system. The surface roughness, microhardness, and constitution of samples treated by single nitriding and samples treated by composite technology were characterized. The tribological properties of the samples were investigated on a CSM ball-on-disc tribometer. The results show that plasma nitriding effectively enhances the wear resistance of the substrate. The wear rate decreases first and then increases with the increase of nitriding temperature, and the wear rate reaches the minimum at 900 °C. However, the increase in roughness caused by nitriding treatment leads to an increase in the friction coefficient. It is found that surface textures can obviously reduce the friction coefficient of the nitrided titanium alloy. In addition, it can also reduce the wear rate of titanium alloys after nitriding at 900 and 950 °C. It can be concluded that the nitriding and surface texturing combined treatment can obviously reduce the friction coefficient and wear rate at the nitriding temperatures of 900 and 950 °C. This is attributed to the combined effect of high hardness of nitride layers and the function of micro-trap for wear debris of surface textures.

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39

Li, Jie, Huai Wu Zhang, Yuan Xun Li, Hua Su, and Yan Bing Ma. "Influence of Bi₂O₃ on the Structure and Magnetic Properties of Barium Ferrite Powders Materials." Advanced Materials Research 499 (April 2012): 31–34. http://dx.doi.org/10.4028/www.scientific.net/amr.499.31.

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In this study, influence of Bi2O3on the structure and magnetic properties of barium ferrites has been studied in samples performed by using the solid-state reaction method. Samples, prepared with different amount of sintering additive are sintered at temperatures from 850°C to 950°C. The scanning electron microscope micrographs shows that the samples with 3wt% additive, calcinated at 900°C, have a particle size smaller than 1μm. Annealing treatment in air at 950°C led to an order-of-magnitude increase of the saturation magnetization of 60.42emu/g and coercive force of 4150.5Oe, which are due to the liquid phase sintering mechanism and the increasing grain size.

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40

Sailon, Sailon, Dicky Seprianto, and Ekki Andika. "Pengaruh Carburizing Arang Tulang Sapi Terhadap Peningkatan Kekerasan Egrek Produk Pande Besi Desa Tanjung Pinang." AUSTENIT 14, no. 2 (2022): 69–74. http://dx.doi.org/10.53893/austenit.v14i2.4922.

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Tujuan dari riset ini yakni akan mengetahui pengaruh karburasi arang tulang sapi terhadap peningkatan kekerasan egrek produk pandai besi di Desa Tanjung Pinang. Metode riset ini merupakan eksperimen pack carburizing memakai arang tulang sapi dengan variasi suhu 850°C, 900°C, serta 950°C serta waktu penahanan 30 menit, 45 menit, serta 60 menit. Hasil riset ini membuktikan jika komposisi bahan egrek produk pandai besi dengan nilai karbon unsur 0,414% dan pack carburizing menggunakan arang tulang sapi mempengaruhi kekerasan, nilai kekerasan permukaan teratas pada variasi suhu 950°C dengan waktu penahanan 60 menit sejumlah 59,2 HRC. Suhu sangat berpengaruh dalam melakukan pack carburizing terhadap peningkatan kekerasan permukaan.

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41

Lv, Yukun, Pingtao Song, Yuzhe Wang, et al. "Improving Mechanical Properties of Fe-Mn-Co-Cr High-Entropy Alloy via Annealing after Cold Rolling." Materials 17, no. 3 (2024): 676. http://dx.doi.org/10.3390/ma17030676.

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The as-cast (Fe50Mn30Co10Cr10)97C2Mo1 HEA (high entropy alloy) was prepared and cold-rolled at 70%. Subsequently, annealing heat treatment at different temperatures (900 °C, 950 °C, 1000 °C) was carried out. The microstructure evolution and mechanical properties of the HEA were systematically investigated. The results showed that the HEA annealed at 900 °C and 950 °C exhibited uneven grain size and rich σ precipitation phase at grain boundaries. The grains began to grow and complete recrystallization, and no σ phases were observed in HEA annealed at 1000 °C, which resulted in a higher tensile strength of ~885 MPa and elongation of ~68% compared with other annealed HEAs. The higher volume fraction of annealing twins with 60°<111> orientation was produced in HEA annealed at 1000 °C, which enhanced the tensile strength and plasticity via the Twinning-induced plasticity (TWIP) mechanism.

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42

KIKUCHI, Kenji, HeinzJosef PENKALLA, and Hiroshi NISHI. "Creep Constitutive Equation in Hastelloy XR. For Cases of 900 and 950.DEG.C.." Transactions of the Japan Society of Mechanical Engineers Series A 63, no. 613 (1997): 2032–37. http://dx.doi.org/10.1299/kikaia.63.2032.

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43

Da Luz, José Aurélio Medeiros, and Igor Alberto De Melo Souza. "PROPRIEDADES DE ÓLEOS EMPREGADOS EM FLOTAÇÃO." HOLOS 3 (July 3, 2014): 227. http://dx.doi.org/10.15628/holos.2014.1800.

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Neste trabalho se buscou a sistematização das características de quatro amostras de óleos vegetais e uma amostra de sebo bovino, no que concerne a suas propriedades físico-químicas como com o fito de estabelecer padrões de comportamento e de desempenho em sistemas de flotação. Os óleos vegetais estudados foram: de arroz refinado, de rícino, de semente de uva e de soja refinado, usualmente empregados em operações de tecnologia mineral, com ênfase em seu uso em sistemas de flotação em espuma. As massas específicas determinadas foram: 930 kg/m³ para o óleo de semente de uva; 950 kg/m³ para o óleo de rícino; 910 kg/m³ para o óleo de arroz refinado; e 920 kg/m³ para o óleo de soja. Quanto à tensão superficial foram realizados 26 ensaios para cada amostra de óleo vegetal sendo que os valores variam de 0,0323 N/m a 0,0334 N/m. Viscosidade dinâmica aparente, tensão superficial, índice de refração e valores de umidade também foram levantados. Os resultados permitiram aceder às propriedades das amostras e confrontá-las com as que se descrevem na literatura, servindo, assim, como subsidio ao entendimento da influência destas propriedades na flotação.

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44

Gong, Chen Chen, Xiao Bo Yan, De Li Lou, and Dong Xu Li. "Influence on Activation Property of Coal Gangue by Calcining Temperature." Applied Mechanics and Materials 174-177 (May 2012): 1137–40. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1137.

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Influence on activation property of coal gangue by calcining temperature was discussed. The experimental results show that C12A7 and C2S with hydraulic-activity are created in coal gangue calcined at 900 - 950°C which has reasonable pore distribution after hydrating.

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45

Tong, Ying. "Finite Element Analysis of TA15 Titanium Alloy Beam Hammer Forging Forming at Different Temperatures." Advanced Materials Research 339 (September 2011): 180–83. http://dx.doi.org/10.4028/www.scientific.net/amr.339.180.

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The hammer forging forming process of TA15 titanium alloy girder is taken as an example on this study. When girder were formed at different original temperature as 850 °C、900 °Cand 950 °C, the needed hammering times and each hammer’s stroke and varieties of damage factor were researched respectively based on software Deform. By simulation analysis, the needed hammering times is 7 times, 5 times and 4 times in order, and the damage factor which dangerous place located at the right top fillet of girder reached the highest point at about 86mm stroke ,and the original temperature 950 °C gave the best answer. The results are significant theoretical foundation for the practical production and study of TA15 titanium alloy.

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46

Basnet, Satish, Anni Hartikainen, Aki Virkkula, et al. "Contribution of brown carbon to light absorption in emissions of European residential biomass combustion appliances." Atmospheric Chemistry and Physics 24, no. 5 (2024): 3197–215. http://dx.doi.org/10.5194/acp-24-3197-2024.

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Abstract. Residential biomass combustion significantly contributes to light-absorbing carbonaceous aerosols in the atmosphere, impacting the earth's radiative balance at regional and global levels. This study investigates the contribution of brown carbon (BrC) to the total particulate light absorption in the wavelength range of 370–950 nm (BrC370–950) and the particulate absorption Ångström exponents (AAE470/950) in 15 different European residential combustion appliances using a variety of wood-based fuels. BrC370–950 was estimated to be from 1 % to 21 % for wood log stoves and 10 % for a fully automatized residential pellet boiler. Correlations between the ratio of organic to elemental carbon (OC / EC) and BrC370–950 indicated that a one-unit increase in OC / EC corresponded to approximately a 14 % increase in BrC370–950. Additionally, BrC370–950 was clearly influenced by the fuel moisture content and the combustion efficiency, while the effect of the combustion appliance type was less prominent. AAE470/950 of wood log combustion aerosols ranged from 1.06 to 1.61. By examining the correlation between AAE470/950 and OC / EC, an AAE470/950 close to unity was found for pure black carbon (BC) particles originating from residential wood combustion. This supports the common assumption used to differentiate light absorption caused by BC and BrC. Moreover, diesel aerosols exhibited an AAE470/950 of 1.02, with BrC contributing only 0.66 % to the total absorption, aligning with the assumption employed in source apportionment. These findings provide important data to assess the BrC from residential wood combustion with different emission characteristics and confirm that BrC can be a major contributor to particulate UV and near-UV light absorption for northern European wood stove emissions with relatively high OC / EC ratios.

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Dihom, Mustafa Mousa, Abdul Halim Shaari, Hussein Baqiah, et al. "Effects of Calcination Temperature on Microstructure and Superconducting Properties of Y123 Ceramic Prepared Using Thermal Treatment Method." Solid State Phenomena 268 (October 2017): 325–29. http://dx.doi.org/10.4028/www.scientific.net/ssp.268.325.

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Thermal treatment method was employed to produce YBa2Cu3Ox superconductor ceramic. The effects of calcination temperature at 850 °C, set A, and 910 °C, set B, for 24 h followed by sintering at 930, 950 and 980 °C, were investigate using X-ray diffraction (XRD), scanning electron microscope (SEM) and four point probe measurement. The orthorhombic structure appears after calcination at 850 and 910 °C beside small amount of impurity phase such as Y2BaCuO5 (Y211). The samples exhibited metallic behaviour and the critical temperature, TC(R=0), increases with increasing sintering temperature. The TC(R=0) of samples calcined at 910 °C is higher than that of sample calcined at 850 °C. The highest TC(R=0), 87 K, was found for sample sintered at 980 °C of set B. An increase in grain size and homogeneity was observed as the sintering temperature increases. The set B sample sintered at 980 °C showed compact grains, which could result in the highest Tc (R=0).

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48

Nabati, Maryam, Hassan Abdoos, and Hamidreza Mohammadian Semnani. "The effect of SiC nanoparticles and sintering temperature on the structural and wear properties of Cu–MWCNTs–SiC hybrid nanocomposites." International Journal of Materials Research 112, no. 1 (2021): 25–34. http://dx.doi.org/10.1515/ijmr-2020-7753.

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Abstract SiC nanoparticles play an important role in Cu–MWCNTs nanocomposites. So far, the effect of SiC volume fraction has not been considered on the properties of Cu–MWCNTs–SiC hybrid nanocomposites. Copper-based hybrid nanocomposites with 2 vol.% carbon nanotubes and 1–3 vol.% SiC nanoparticles were prepared via powder metallurgy. The composite powders were compacted and then sintered at 850, 900 and 950 °C for 1 h. Increasing the volume fraction of SiC nanoparticles restricts the grain growth, decreases the friction coefficient, and increases the hardness and wear resistance of prepared nanocomposites. The coefficient of friction and wear rate of Cu–MWCNTs–SiC hybrid nanocomposites decreased with increasing SiC content. Nanocomposites sintered at 900 °C exhibited higher hardness and wear resistance compared to other samples. The highest hardness and wear resistance were related to the Cu-2 vol.% MWCNTs-3 vol.%SiC hybrid nanocomposite sintered at 900 °C, which shows approximately 24 and 78% improvement over the pure copper specimen, respectively. Wear resistance and hardness were reduced for samples sintered at 950 °C.

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49

Kalynka, Andrii, Oksana Lesyk, Olha Stadnytska та Leonid Tomash. "25th anniversary of the meat breeding industry of Вukovyna!" Agroscience and Practice 3, № 1 (2024): 41–50. http://dx.doi.org/10.32636/agroscience.2024-(3)-1-7.

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The article presents the results of a retrospective analysis of the 25th anniversary of the establishment of the meat cattle industry in the Carpathian region of Bukovyna. It is shown that domestic herds of a new population of the Bukovyna zonal type of hornless Simmental beef cattle have been formed, which are characterized by the following selection and production indicators: live weight of cows 550–650 kg, milk yield for 210 days 215–235 kg, intensity of growth of young animals on suckling in summer 950–1500 g/day, daily gains for the entire growing period 900–950 g, carcass weight at the age of 18–24 months 265–275 kg, slaughter yield 60.1–61.2%, reduction in the cost of maintenance – 8–12%, profitability of 17–21% with an economic effect of UAH 950 per year without state support for obtaining cheap beef in the Carpathian zone. According to the research results, it was established that in the past the following bulls-progenitors were widely used: Forest 0899, Ivor 1001 of line Achilles 369; Micron 3981 and Major 1351 of line Abricott 58311; Apollon 1843, Maskit 1822, Svitiaz 1865, Anthracyt 1868, Exterier 4865, Kaban 1856 of line Signal 120; Khmuryi 9967 of line Zelott 016040491 and others, which ensured obtaining average daily gains of 950–1150 g at feed costs of 7.1–7.5 feed units for the entire growing cycle in the conditions of different climatic zones of the Carpathian region

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50

Zhu, Haifeng, Xiaopeng Wang, Wei Meng, and Fantao Kong. "Effects of Heat Treatment on Microstructures and Properties of Cold Rolled Ti-0.3Ni Sheets as Bipolar Plates for PEMFC." Metals 12, no. 5 (2022): 792. http://dx.doi.org/10.3390/met12050792.

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As promising materials for bipolar plates substrate, as-cold rolled Ti-0.3Ni (wt.%) sheets were heat treated with three different processes in this work. As-cold rolled sheets consist of α matrix and dispersed Ti2Ni intermetallic precipitates, and typical Widmanstatten microstructure can be observed after heat treatment. Lamellar Ti2Ni precipitates inside the colonies. Elongation of as-cold rolled sheets equals less than 7% while this value rises up to around 20%, and tensile strength decreases by more than 47% after heat treatment. Open circuit potentials of as-cold rolled sheets treated at 950 °C for 1 h followed by wind cooling (950 °C/1 h/WC), sheets aged at 500 °C for 3 h followed by air cooling (950 °C/1 h/WC + 500 °C/3 h/AC), and sheets treated at 950 °C for 1 h followed by furnace cooling (950 °C/1 h/FC) equals −0.536 V, −0.476 V, −0.486 V, −0.518 V, respectively. A potentiodynamic polarization test reveals that all of the specimens exhibit typical active–passive transition behavior. Sheets treated at 950 °C/1 h/WC possess the lowest corrosion current density (155.4 μA·cm−2). Results of electrochemical impedance spectroscopy (EIS) show that 950 °C/1 h/WC treated sheets possess the largest polarization resistance (Rpol), 122.6 Ω·cm2. Moreover, steady-state current densities (Iss) increase in the order of 950 °C/1 h/WC, 950 °C/1 h/WC + 500 °C/3 h/AC, 950 °C/1 h/FC according to the results of potentiostatic polarization. This can be attributed to various amounts of Ti2Ni precipitation caused by different cooling rates.

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Journal articles on the topic '950'

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