材料期刊网

Effects of Forming Conditions and TiC-TiB₂ Contents on the Microstructures of Self-Propagating High-Temperature Synthesized NiAl-TiC-TiB₂ Composites

Na Wei , Hong-Zhi Cui , Jie Wu , Jun Wang , Guan-Long Wang , Chen Jiang

金属学报(英文版) doi:10.1007/s40195-014-0163-y

关键词: NiAl-TiC-TiB2 composite , Self-propagating high-temperature synthesis (SHS) , Forming condition TiC-TiB2 content , Microstructure

Self-propagating High-temperature Synthesis, Microstructureand Mechanical Properties of TiC-TiB2-Cu Composites

Chuncheng ZHU , Xinghong ZHANG , Xiaodong HE , Qiang XU

材料科学技术（英）

TiC-TiB2-Cu composites were produced by self-propagating high-temperature synthesis combined with pseudo hot isostatic pressing using Ti, B4C and Cu powders. The microstructure and mechanical properties of the composites were investigated. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results showed that the final products were only TiC, TiB2 and Cu phases. The clubbed TiB2 grains and spheroidal or irregular TiC grains were found in the microstructure of synthesized products. The reaction temperature and grain size of TiB2 and TiC particles decreased with increasing Cu content. The introduction of Cu into the composites resulted in a drastic increase in the relative density and flexual strength, and the maximum values were obtained with the addition of 20 wt pct, while the fracture toughness was the best when Cu content was 40 wt pct.

关键词: Composite , null , null , null