Cohesion strength and fracture toughness of Mo-TiC interfaces

被引：21
|
作者：
Zhao, J. [1 ]
Liu, L. C. [1 ]
Gong, H. R. [1 ]
Gong, X. [2 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2020年 / 382卷
关键词：
Cohesion strength; Fracture toughness; Mo-TiC interfaces; First principles calculations; 1ST-PRINCIPLES CALCULATIONS; MOLECULAR-DYNAMICS; MOLYBDENUM ALLOYS; ATOMIC STRUCTURES; TRANSITION; COMPOSITE; MICROSTRUCTURE; IMPROVEMENT; DUCTILITY; ENERGIES;
D O I：
10.1016/j.surfcoat.2019.125158
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
First principles calculations reveal that interface orientation plays a decisive role in determining the cohesion properties of Mo-TiC interfaces, i.e., the addition of TiC (111) surface to Mo (110) surface could increase the cohesion strength and toughness/ductility of Mo (110) surface, whereas TiC (100) surface would decrease the cohesion strength and toughness/ductility of Mo (100) or Mo (110) surface. The present calculated results are deeply understood in terms of electronic structure, agree well with experimental observations, and could clarify the two experimental controversies regarding the effects of TiC on cohesion strength and fracture toughness of Mo in the literature.
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页数：6
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