Structural design and toughening mechanism of laminated graphene ceramic tool materials

被引：17
作者：
Chen, Benshuai [1 ,2 ]
Xiao, Guangchun [1 ,2 ,3 ]
Yi, Mingdong [1 ,2 ]
Zhang, Jingjie [1 ,2 ]
Chen, Hui [1 ,2 ]
Zhou, Tingting [1 ,2 ]
Chen, Zhaoqiang [1 ,2 ]
Xu, Chonghai [1 ,2 ,3 ]
机构：
[1] Qilu Univ Technol, Sch Mech & Automot Engn, Shandong Acad Sci, Jinan 250353, Peoples R China
[2] Qilu Univ Technol, Key Lab Adv Mfg & Measurement & Control Technol L, Shandong Acad Sci, Jinan 250353, Peoples R China
[3] Shandong Inst Mech Design & Res, Jinan, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 22期
基金：
中国国家自然科学基金;
关键词：
Ceramic tool; Laminated; Graphene; Mechanical properties; Microstructure; R-CURVE BEHAVIOR; FABRICATION; ALUMINA; ENERGY; GNPS;
D O I：
10.1016/j.ceramint.2021.08.121
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：
Based on the finite element model, laminated graphene ceramic tool materials were designed, and the effects of the number of layers and thickness ratio on the residual stress were investigated. According to the simulation design results, laminated Al2O3-TiB2-graphene/Al2O3-TiN (ATBGN) ceramic tool materials with various structures were prepared using the spark plasma sintering process, and their mechanical properties and microstructures were studied and analyzed. The fracture toughness and flexural strength of ATBGN were 8.65 +/- 0.18 MPa m1/2 and 755 +/- 25 MPa, respectively, which increased by 66.7% and 21.6%, respectively, compared to those of monolithic Al2O3-TiB2 ceramic. Under the synergistic action of graphene and residual compressive stress, the multiscale deflection of cracks and the change in fracture mode occurred, which made the substantial contribution to the improvement in mechanical properties.
引用
收藏
页码：32264 / 32275
页数：12
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