共搜索到11664条信息，每页显示10条信息，共1167页。用时：0小时0分0秒450毫秒
Pressure acid leaching of black shale for extraction of vanadium LI Min-ting(李旻廷), WEI Chang(魏 昶), FAN Gang(樊 刚), LI Cun-xiong(李存兄),DENG Zhi-gan(邓志敢), LI Xin-bin(李兴彬) Faculty of Metallurgical... ____________________________________________________________________________________________ Abstract: Extraction of vanadium from black shale was attempted in pressure acid leaching. The chemical components of the sample obtained from Guizhou Province of China......
Trans. Nonferrous Met. Soc. China 22(2012) 1563-1567 Infiltration of A6063 aluminium alloy into SiC-B4C hybrid preforms using vacuum assisted block mould investment casting technique Alptekin... and EDX analysis. The result indicates that, by the vacuum assisted block mould investment casting technique, the infiltration of the preforms by molten metal was successfully realized. Key words......
......
of Aeronautical Technology, Nanchang 330034, China) Abstract: The high volume fraction SiCp/Al composites were fabricated by vacuum-adjustable pressure infiltration process. The results show that infiltration and solidification are effectively promoted by vacuum-adjustable pressure infiltration process, which also avoids the gas and the inclusion binds. The preform of a single minimum SiC particle......
in an old moon BU 450 vacuum system machine at 1000 ℃ with a pressure of 100 kPa from 99.99% purity Ar gas. After infiltration, the molds were disintegrated by repetitively quenching in water for 10 min... accuracy from polymeric foam patterns through a pressure infiltration casting process. The strength of open-cell foam is much less than that of the closed-cell counterpart, and thereby subjects......
by a high pressure and high temperature(HPHT) infiltration technique.Their microstructural evolution and thermal conductivity were presented as a function of sintering parameters(temperature,pressure...Effect of sintering parameters on the microstructure and thermal conductivity of diamond/Cu composites prepared by high pressure and high temperature infiltrationHui Chen1,2,Cheng-chang Jia11. School......
: The kinetics on vacuum refining process of metallurgical grade silicon was studied using maximum evaporation rate, critical pressure and mean free path of phosphorus in the metallurgical grade silicon... to study the kinetics in the vacuum distillation process of metallurgical grade silicon. It has proved that the evaporation rate of element is affected mainly by temperature and pressure. This study......
systemically the thermodynamic performance for MG-Si refining via vacuum distillation to provide a theoretical base for SOG-Si production.2 Relationship between vapor pressure of Si, P and temperature Based on the different properties of elements contained when vaporizing and condensing, crude metal can be separated from impurities by vacuum distillation refining. The difference in vapor pressure of each......
and solidification pressure was established. The results indicate that ultrasonic effect and extrusion and infiltration effect of solidification pressure affect the secondary dendrite arm spacing of vacuum...;Working theory of vacuum counter-pressure casting under ultrasonic vibration 图2 超声功率-凝固压力协同作用工艺曲线 Fig. 2 Process graphs of synergistic action between ultrasonic power and solidification......
的样品在不同频率段的吸声系数 Fig. 3 Sound absorption coefficients of samples prepared by traditional vacuum infiltration casting(a) and counter-gravity infiltration casting(b) in different frequency regions 图... K, KIM J K, GUPTA N, SIMON A, DAOUD A. Compressive characteristic of A356/fly ash cenosphere composites synthesized by pressure infiltration technique[J]. Composites Part A: Applied Science......
