The effect of carbon source and molar ratio in Fe-Ti-C system on the microstructure and mechanical properties of in situ TiC/Fe composites

被引：7
|
作者：
Xu, Zheng-Bo [1 ,2 ,3 ]
Kou, Shu-Qing [1 ,2 ,3 ]
Yang, Hong-Yu [1 ,2 ,3 ,4 ,5 ]
Dong, Bai-Xin [1 ,2 ,3 ]
Han, Yue [1 ,2 ,3 ]
Chen, Liang-Yu [4 ]
Qiu, Feng [1 ,2 ,3 ]
Jiang, Qi-Chuan [1 ,2 ,3 ]
机构：
[1] Jilin Univ, State Key Lab Automot Simulat & Control, Changchun, Peoples R China
[2] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Renmin St 5988, Changchun 130025, Jilin, Peoples R China
[3] Jilin Univ, Dept Mat Sci & Engn, Renmin St 5988, Changchun 130025, Jilin, Peoples R China
[4] Jiangsu Univ Sci & Technol, Natl Demonstrat Ctr Expt Mat Sci & Engn Educ, Zhenjiang 212003, Peoples R China
[5] Foshan Southern China Inst New Mat, Foshan 528200, Guangdong, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2022年 / 48卷 / 20期
基金：
中国国家自然科学基金;
关键词：
TiC; Fe composites; Carbon source; Molar ratio; Mechanical performance; LATTICE-PARAMETER; MASTER ALLOY; AL; BEHAVIOR; IRON; NANOPARTICLES; TITANIUM; FERRITE; MG; DIFFRACTION;
D O I：
10.1016/j.ceramint.2022.06.319
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：
The size, distribution, and morphology of TiC particle in Fe-Ti-C system have a great influence on the me-chanical properties of TiC/Fe composites. In this work, TiC/Fe composites were fabricated in the Fe-Ti-C system with different carbon source and molar ratio by combustion synthesis and hot-pressing method. Morphology and size of ceramic particles, as well as microstructure, interface bonding and mechanical properties of composites were compared. The results showed that the size of TiC particles decreased with increase of Fe content of Fe-Ti-C systems fabricated by the same carbon source, while the particles change from spherical shapes to cubic shapes which can reduce stress concentration between ceramic particles and matrix. Furthermore, TiC/Fe composites fabricated by 5Fe-Ti-carbon blacks (CBs) system exhibited superior yield strength (1523 MPa) compressive strength (2203 MPa) and microhardness (691.5 HV), caused by the high interface bonding strength and lamellar pearlite matrix which can commendably limit the dislocation slip. By comparison, TiC/Fe composites fabricated by 21Fe-Ti-carbon nanotubes (CNTs) system showed higher fracture strain (25.85%) on account of the ferrite matrix with favorable plastic. This work reveals the influence of carbon source and molar ratio of Fe-Ti-C system on TiC/Fe composites, which is helpful to further improve the properties of TiC/Fe composites.
引用
收藏
页码：30418 / 30429
页数：12
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