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《Ordnance Material Science and Engineering》 2006-04
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Effect of stored energy on sintering process of pure metal powders

LIN Yun1,2,ZHANG Wen-xing1,CHAI Dong-lang1,QI Zhi-wang3,SHI Hong-gang3(1.School of Material Science and Technology,Xi'an Jiaotong University,Xi'an 710049,China;2.Guiyang University,GuiYang 550005,China;3.Ningbo Branch of China Academy of Ordance Science,Ningbo 315103,China)  
In order to study the influence of cold pressing and heating mode on sintering,a high temperature optical microscope was employed to in-situ observe the sintering process of Al-Mg and Al-Cu elementary powders systems.The results showed that they all affected sintering rate to a great extent.The melting rate of particles when isothermal sintering was much faster than that when staged sintering under the same maximum temperature.The annealing treatment before sintering could greatly slow sintering process.In a certain range,sintering rate could increase with the compacting pressure level increasing.Further analysis suggested that stored energy when cold compacting was the reason of the above results,and the appropriate using of stored energy could be an important way to enhance sintering efficiency.These results would provide direct experience basis to optimize the present powder metallurgy routines.
【Fund】: 科技部重大基础研究前期研究专项(02061005);; 国家自然科学基金项目(59771016)
【CateGory Index】: TF124.5
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1 YAN Feng WU Kun ZHAO Min (School of Materials Science and Engineering, Harbin Institute of Technology,Harbin 150001,China)[WT5HZ];Superplasticity of SiC_w/MB15 Magnesium Matrix Composites[J];JOURNAL OF MATERIALS ENGINEERING;2000-03
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