Insights into intragranular precipitation and toughening effect of W in (Ti, W)C solid solution with TiH2 as the inducer

被引：6

作者：

Jia, Peng ^{[1
]}

Chen, Lei ^{[1
,2
,3
]}

Wang, Yujin ^{[1
,3
]}

Liu, Zhanguo ^{[1
,3
]}

Ouyang, Jiahu ^{[1
,3
]}

Zhang, Xinghong ^{[2
]}

Zhou, Yu ^{[1
,3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150001, Heilongjiang, Peoples R China

[3] Harbin Inst Technol, Key Lab Adv Struct Funct Integrated Mat & Green M, Harbin 150001, Heilongjiang, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 16期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

(Ti; W)C-W composite; Solid solution; Precipitation; Microstructure; MICROSTRUCTURE; CERMETS; ZRC; MO;

D O I：

10.1016/j.ceramint.2019.07.045

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(Ti, W)C-W composites have been successfully synthesized by in-situ precipitation of multiscale W-rich particles in (Ti, W)C solid solution incorporated with TiH2 as inducer. The microstructure of (Ti, W)C-W composites is characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The variations in lattice parameter of (Ti, W)C solid solution with increasing the sintering temperature are dependent upon the in-situ precipitation process of W-rich phase. The low temperature sintering route is beneficial to the precipitation of W-rich phase due to high concentration gradient in (Ti, W)C solid solution. The intragranular W-rich precipitates in the (Ti, W)C matrix exhibit semi-coherent interface and an orientation relationship of [111](w)//[011]((Ti, W)C). The in-situ precipitation of multiscale W-rich particles have a positive influence on the fracture toughness, and the value of (Ti, W)C-W composite obtained at 1700 degrees C is 4.23 MPa m(1/2).

引用

页码：20626 / 20633

页数：8

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