摘要
本文采用粉末冶金工艺制备了含有不同亚微米级Si C颗粒的Ti(C,N)基金属陶瓷材料。通过密度测试仪、抗弯强度测试仪、维氏硬度测试仪、X射线衍射分析仪和扫描电镜等方法研究了亚微米级Si C颗粒对Ti(C,N)基金属陶瓷材料的组织结构和性能的影响。结果表明:亚微米级Si C颗粒对Ti(C,N)基金属陶瓷材料的力学性能和微观组织具有复杂的影响。Si C颗粒能促进粘结相和硬质相的界面形成良好的冶金结合,细化组织,并对裂纹扩展路径产生影响,有助于提高材料的断裂强度和显微硬度;但是,过量的Si C颗粒又会促使材料中出现局部疏松组织,对材料的微观结构和性能产生不利影响。
Ti（ C, N）-based cermet with different sub-micro SiC particle content were fabricated by powder metallurgy process. The density tester, Transvers rupture strength （TRS） tester, Vichers hardness （Hv） tester, X-ray diffraction （XRD） tester, and Scanning electric microscope （SEM） tester were used to study the effect of sub-micro SiC particle on the microstructure and properties of Ti（ C ,N）-based cermet. The results show that the complex effect of sub-micro SiC particle on the micL＇ostructure and mechanical properties of Ti （ C, N） -based cermet varies with its content. Sub-micro SiC particles can promote the formation of metallurgy interface bonding between the ceramic hard phase and metal binding phase, refinement of microstructare and good influence on crack propagation path, which help to improve the cermet strength（TRS） and microhardness（Hv）. However the content of sub-micro SiC above the critical value will make the appearance of local pore, which have an adverse effect on the mechanical properties and microstructure.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2015年第3期170-175,共6页
Powder Metallurgy Technology
基金
重庆市自然科学基金项目(cstc2012jjys0003)
重庆市教委项目(KJ131220)
重庆文理学院人才引进项目(R2012CJ16)
重庆文理学院重点项目(Z2012CJ19)
关键词
氮碳化钛
金属陶瓷
碳化硅
微观组织
性能
Titanium carbonnitride
Cermet
Silicon carbide
microstructure
Property.
