摘要
本文采用高能球磨法制备纳米结构WC-Co粉末,并采用放电等离子体烧结方法(SPS)对该纳米粉末进行致密化。使用X射线衍射、SEM等手段分析了高能球磨对WC-Co复合粉末中WC晶粒尺寸和粒度的影响。发现经过90h左右的高能球磨,WC-Co的粉末粒度可以达到300nm左右,而WC的晶粒尺寸可以细化到8nm左右。经过SPS烧结后,合金中的WC相的晶粒尺寸可以保持在300nm左右,而Co多以fcc结构出现。
In this paper the nanostructured WC-Co powder is fabricated by high-energy ball milling, and also consolidated by spark plas- ma sintering （SPS） subsequently. X-ray diffraction and SEM are used to analyze the grain -size of WC and the particle size of WC-Co in the ball milling. It is found that by 90 hours of high-energy ball milling, the particle size of WC-Co is about 300 nm, and the grain size of WC can be refined to 8 nm. After the SPS sintering, the grain size of WC in the hardmetal can be retained as 300 nm or so. The cobalt in the SPS sintered hardmetal is normally in the form of fcc.
出处
《硬质合金》
CAS
北大核心
2007年第2期80-83,共4页
Cemented Carbides
关键词
高能球磨
纳米结构
WC-CO
SPS烧结
high-energy ball milling
nanostructure
WC-Co
spark plasma sintering
