Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第11卷    第5期    总第44期    2001年10月

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文章编号:  1004-0609(2001)05-0796-05
放电等离子烧结钼的组织和性能
张久兴, 刘科高, 王金淑, 周美玲, 左铁镛

(北京工业大学 教育部新型功能材料重点实验室,北京 100022)

摘 要:  研究了放电等离子烧结(SPS)钼的致密化、组织和硬度。与其它烧结方法相比,SPS是一种时间短、 温度低的先进快速烧结法。利用SPS在比CIP-S和热压烧结(HP)低180~500℃下进行烧结,保温3*!min,得到钼的相对密度是95.2%~97.9%,硬度比其它方法烧结的高出HV20~HV75。 SPS烧结钼的密度呈现随烧结温度的升高而增加的趋势,但是其硬度有所下降。SPS在较低温度下烧结的钼的硬度较高,原因是其晶粒较细。SPS烧结钼的断口呈沿晶断裂,属于脆性断裂。

 

关键字:  放电等离子烧结; 钼; 致密化

Microstructure and property of
molybdenum prepared by
spark plasma sintering
ZHANG Jiu-xing, LIU Ke-gao, WANG Jin-shu,
ZHOU Mei-ling, ZUO Tie-yong

The Key Laboratory of Advanced Functional Materials,
Ministry of Education,Beijing Polytechnic University,
Beijing 100022, P.R.China

Abstract: The densification, microstructure and hardness of molybdenum prepared by spark plasma sintering (SPS) were investigated. SPS is an advanced rapid sintering technique with a lower temperature and shorter time, compared with other sintering techniques. The molybdenum sintered by SPS at 180~500℃ lower than by CIP-S and HP and in holding time of 3min obtained relative density of 95.2%~97.9% and hardness HV20~HV75 higher than that by other sintering techniques. The density of molybdenum sintered by SPS increases and the hardness  of molybdenum decreases with the temperature increasing. The molybdenum sintered at lower temperature by SPS having higher hardness is due to fine grain strengthening. The fracture mode of SPS sintered molybdenum belongs to brittle intercrystalline fracture.

 

Key words:  spark sintering plasma; molybdenum; densification

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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