Densification and microstructure evolution during SPS consolidation process in W-Ni-Fe system

被引：48

作者：

Hu Ke ^{[1
]}

Li Xiao-qiang ^{[1
]}

Yang Chao ^{[1
]}

Li Yuan-yuan ^{[1
]}

机构：

[1] S China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 03期

关键词：

densification behavior; microstructure evolution; SPS; W-Ni-Fe alloy; GRANULATED ZIRCONIA POWDER; MECHANICAL-PROPERTIES; PLASMA; ALLOY;

D O I：

10.1016/S1003-6326(11)60742-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Spark plasma sintering method (SPS) was used to consolidate mixed W-5.6Ni-1.4Fe (mass fraction, %) powders from commercial fine elemental powders, and both the densification behavior and microstructure evolution in sintering were investigated at different heating rates. The results show that the SPS densification process can be divided into three stages. At the initial unshrinking stage, fast heating generates instantaneous discharge and locally inhomogeneous temperature distribution in solid-state powder particles, enhancing later densification; during the intermediate solid state sintering stage, diffusion is more sufficient in the slow-heated SPS process; at the final transient liquid-phase sintering stage, tungsten grains become sphered and coarsen rapidly, but fast heating helps maintain rather small grain sizes.

引用

页码：493 / 501

页数：9

共 21 条

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