Rapid sintering and microstructure evolution of composite TiC cermet

1st International Conference on New Material and Chemical Industry

材料科学;化学工业

Ding, L.^1,2 ; Liu, X.G.^1,2 ; Pan, Y.L.^1,2 ; Wang, Y.W.^1,2 ; Xiang, D.P.^1,2

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou

570228, China^1

Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou

570228, China^2

关键词: Ball milling time;    High hardness;    High-energy ball milling;    Low sintering temperature;    Micro-structure evolutions;    Rapid sintering;    Ring structures;    TiC cermet;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/167/1/012076/pdf
DOI  :  10.1088/1757-899X/167/1/012076

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Ti, Ni, activated carbon, and Mo powders were used as raw materials to prepare a composite TiC cermet in this study. The powders were mixed and prepared through high-energy ball milling and then sintered in a spark plasma sintering (SPS) system. Results revealed that ball milling time affected the raw materials. After ball milling was performed for 10 h, Ti and C particles reacted and generated TiC, meanwhile, the solid Mo solutionized in TiC and formed (Ti,Mo)C lumps. XRD results showed that the product of (Ti,Mo)C cermet with high hardness can be prepared at a low sintering temperature of 1150 °C. The microstructure of composite TiC cermet was different from the traditional core-ring structure. In particular, the developed microstructure comprises a (Ti,Mo)C-Ni dark-gray phase at the center surrounded by (Ti,Mo)C light-gray phase and dispersed Mo white phase.