摘要
研究了W-Ni-Fe合金在2.45 GHz微波炉中瞬时液相烧结的致密化行为和力学性能。结果表明:微波辅助热场下的93W-Ni-Fe合金显示出优异的力学性能和快速的致密化过程,其压缩试样在1500℃下烧结5 min后,拉伸强度、延伸率、相对密度和硬度(HRC)分别是1200 MPa,16.6%,98.6%和42.0;在微波辅助热场下,试样烧结可以减少80%的烧结时间;微波辅助热场下的瞬时液相烧结有利于减少烧结时间,加快致密化过程,并且有利于钨晶粒的细化,获得组织均匀和综合性能高的W-Ni-Fe合金。
The transient liquid-phase densification behavior and the mechanical performance of W-Ni-Fe alloy were investigated. This results show that the excellent mechanical properties and the quick densification of 93W-Ni-Fe alloy can be obtained via the microwave-assisted sintering approach in a 2.45 GHz microwave furnace. The tensile strength, the elongation, the relative density and the hardness （HRC） of samples are 1200 MPa, 16.6%, 98.6% and 42.0, respectively after the compacts are sintered at 1500 oC for only 5 min. The compacts can be successfully sintered in a microwave furnace with above 80% reduction in the overall processing time. Transient liquid-phase sintering by microwave-assisted heating is benefcial to saving of a lot of sintering time and accelerating of densification process, which results in W grains refinement, homogeneous microstructure and high comprehensive performances of W-Ni-Fe alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第9期2108-2111,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(50774098)
Creative Research Group of National Natural Science Foundation of China(50721003)
关键词
W-NI-FE合金
微波加热
瞬时液相烧结
力学性能
W-Ni-Fe alloy
microwave-assisted heating
transient liquid phase sintering
mechanical property
