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Trans. Nonferrous Met. Soc. China 22(2012) 1112-1117 Damping capacity of high strength-damping aluminum alloys prepared by rapid solidification and powder metallurgy process LI Guo-cong1, MA Yue1... Materials, Beijing 100095, China Received 9 September 2011; accepted 28 March 2012 Abstract: Two kinds of high strength-damping aluminum alloys (LZ7) were fabricated by rapid solidification and powder......
同质异形体SiC晶须与SiC颗粒的分离 郭梦熊1,王启宝1,安铮1 (1.中国矿业大学(北京校区)化学与环境工程学院,北京,100083) 摘要:在催化作用下利用稻壳为原料合成SiC晶须(SiCw)不可避免地产生同质异形体SiC颗粒(SiCp).烧成料通过筛分使SiCw富集于-100目的物料中,采用反浮选使富碳的SiCp得到去除,获得纯度为85%的SiCw初产品,调整矿浆的pH值至5.2,利用SiCw与SiCp的表面性质差异,采用浮选工艺成功地将微米级的SiCw与SiCp分离出来,获得纯度大于95%的SiCw,SiCw综合回收率达到83.76%.副产品β-SiCp增强SiC基质复合材料的热压制品磨耗比为标准砂轮的49.5倍. 关键词:同质异形体; SiC晶须; SiC颗粒; 浮选; 分离; [全文内容正在添加中] ......
Numerical simulation in powder compaction of metallurgy component HUANG Chun-man(黄春曼), CHEN Pu-qing(陈普庆), SHAO Ming(邵 明), LI Yuan-yuan(李元元) College of Mechanical Engineering, South China.... A new flow stress model was presented by analyzing and summarizing the powder compact experiment with different initial densities. Compared with other models, the new model fits better......
SiC coatings LI Jun, TAN Zhou-jian, ZHANG Xiang, LIAO Ji-qiao (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China) Abstract: The CNT-SiC/SiC composite...文章编号:1004-0609(2011)02-0418-07 原位生长碳纳米管对化学气相沉积SiC涂层的影响 李 军,谭周建,张 翔,廖寄乔 (中南大学 粉末冶金国家重点实验室,长沙 410083) 摘 要:以碳/碳复合材料为基体,MTS为先驱体原料,采用化学气相沉积法在复合材料表面制备CNT-SiC/SiC复合涂层；研究原位生长的碳纳米管(CNTs......
, Hong Kong Polytechnic University, Hong Kong, China) Abstract: With 2kW continuous wave Nd-YAG laser, SiC ceramic powder was laser-cladded on the AA6061 aluminium alloy surface. Within the range..., 0.7Fe, 0.15-0.4Cu, 0.15Mn, 0.8-1.2Mg, 0.04-0.35Cr, 0.25Zn, 0.15Ti and balance Al. The material was machined into specimen blocks of 40mm×40mm×10mm. SiC ceramic powder is of industrial purity......
ZrB_2+SiC陶瓷高温氧化过程中SiC耗尽层的形成机制研究 王超1,王宝来1,栾旭1,梁军1 (1.哈尔滨工业大学,黑龙江,哈尔滨,150001) 摘要:ZrB_2+SiC陶瓷在高温氧化过程中会形成一层多孔的SiC耗尽层.本文首先计算了在高温氧化过程中的主要氧化产物.通过对氧化过程中相变机制的分析,利用质量守恒,固体区域体积守恒并结合反应速率方程,研究了SiC耗尽层的形成与演化过程,给出了孔隙率随温度的变化规律.结果表明:氧化过程中生成相的体积膨胀及SiC的初始体积含量是影响SiC耗尽层孔隙率的主要因素.对计算结果的分析解释了试验中发现的在低SiC含量下不出现耗尽层,以及氧化层破坏的现象. 关键词:ZrB_2+SiC陶瓷; SiC耗尽层; 氧化; 孔隙率; 高温; ZrB_2+SiC; SiC depletion layer; oxidation; porosity......
Preparation of AZ91 alloy by powder metallurgy method JIANG Hai(姜 海)1, HE Xin-bo(何新波)1, QU Xuan-hui(曲选辉)1,2, I. S. HUMAIL2 , WANG Xi-tao(王西涛)2 1. School of Materials Science and Engineering... Received 28 July 2006; accepted 15 September 2006 Abstract: Magnesium alloy AZ91 was prepared by powder metallurgy method, and the effect of sintering temperature on the densities and microstructures......
Trans. Nonferrous Met. Soc. China 20(2010) s1029-s1032 SiC nanoparticles reinforced magnesium matrix composites fabricated by ultrasonic method WANG Zhao-hui(王朝辉), WANG Xu-dong(王旭东), ZHAO Yu-xin(赵宇昕), DU Wen-bo(杜文博) College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China Received 13 May 2010; accepted 25 June 2010 Abstract: SiC......
in cylindrical shape. The preferred mean particle size of the SiC and B4C powders were 60 μm and 55 μm respectively. In early experiments, single powder ratio of 85% SiC and 15% B4C was selected to produce...: AlMMC; SiC; B4C; investment casting; hybrid preform 1 Introduction Metal matrix composites are used in special application areas because of their high specific modulus, strength and wear resistance......
, 253(8): 3757-3760. [9] XU J, ZHANG H, JIANG G, ZHANG B, LI W. SiC whisker reinforced MoSi2 composite prepared by spark plasma sintering from COSHS-ed powder[J]. Transactions of Nonferrous Metals...-jian. In-situ growth of SiC whiskers and application in anti-oxidation coating of C/C composite materials[J]. Materials Science and Engineering of Powder Metallurgy, 2010, 15(3): 277-282. [16] 刘荣军, 张长......
