摘要
以Mo粉和C粉为原料,采用放电等离子烧结技术成功制备钼的碳化物烧结体,通过X射线衍射仪（X-ray diffraction,XRD）、扫描电子显微镜（scanning electron microscopy,SEM）及显微硬度仪等测试分析手段,研究了原料配比对产物的物相组成、微观形貌、显微硬度和气孔率的影响。结果表明:当原料中Mo粉和C粉的摩尔比为2:1时,可制备出致密程度较高的Mo2C烧结体;当Mo粉和C粉的摩尔比为2:1.5时,能够促使Mo2C向Mo C转变;增加原料中的C粉,会降低烧结体的显微硬度和气孔率。
Using Mo powder and C powder as the raw materials,the molybdenum carbide was successfully prepared by spark plasma sintering（SPS） in this paper.The effects of raw material ratio（the mole ratio of Mo/C） on phase composition,morphology,microhardness,and porosity of sintering bodies were analyzed and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and microhardness tester.The results show that,Mo2C with high density can be gained at Mo/C = 2:1 by mole; however,when the mole ratio of Mo/C is 2:1.5,the transformation from Mo2C to Mo C can be promoted.The microhardness and porosity of sintering bodies may be degraded by the further increase in C powder content.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2018年第1期31-35,共5页
Powder Metallurgy Technology
基金
河南省高等学校重点科研项目资助项目(18A430033)
河南省科技开放合作项目资助项目(142106000051)
关键词
放电等离子烧结
物相组成
微观形貌
显微硬度
气孔率
spark plasma sintering
phase composition
microstructures
microhardness
porosity
