Structure formation and densification of TiB2-TiC-Ni composites produced by chemical reaction of Ti-B4C system in high-gravity field

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Pan, C.Z.^1 ; Zhang, J.^1 ; Zhu, B.^1

Army Engineering University, 97 Heping west road, Shijiazhuang

050003, China^1

关键词: Direct reactions;    Equi-axed grains;    Fine-grained microstructure;    High-gravity field;    Intermediate product;    Powder blends;    Rapid cooling;    Structure formations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022049/pdf
DOI  :  10.1088/1757-899X/382/2/022049

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

TiB2-TiC-Ni composites were achieved through direct reaction of Ti and B4C powder blends in a high gravity field of 1800 g with Ni binder. The microstructure of TiB2-TiC composites present pore-free with darker TiB2 platelets and the brighter TiC equiaxed grains easily distinguishable. Ti-B-C-Ni full-liquid SHS intermediate products immediately were formed following the reaction of Ti and B4C, which was considered to yield inherently fine-grained microstructures under the rapid cooling condition. The role of high gravity field was proposed as promoter of the final products densification and grain refinement of TiB2-TiC composites.