R-curve behavior of laminated ZrB2-SiC/Graphite ceramics in two different directions

被引：22

作者：

Liu, Xinchao ^{[1
]}

Wei, Chuncheng ^{[1
]}

Feng, Liu ^{[2
]}

Niu, Jinye ^{[2
]}

Yang, Zanzhong ^{[1
]}

机构：

[1] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255049, Peoples R China

[2] Shandong Univ Technol, Analyt & Testing Ctr, Zibo 255049, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2017年 / 43卷 / 08期

关键词：

Laminated structure; ZrB2-SiC ceramic; Weak graphite layer; R-curve behavior; MECHANICAL-PROPERTIES; ABLATION BEHAVIOR; CARBON NANOTUBE; TEMPERATURE; STRENGTH; ZRB2; MICROSTRUCTURE; COMPOSITES; FABRICATION; TOUGHNESS;

D O I：

10.1016/j.ceramint.2017.02.077

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：

Laminated ZrB2-SiC/Graphite ceramics were fabricated by tap-casting and hot-pressing sintering. In this study, the R-curve behavior in two different directions was investigated using indentation-strength technique. The flexural strengths in the parallel direction and perpendicular direction were 382 MPa and 429 MPa, respectively. The indentation strength values first decreased and then increased with increasing the indentation load. When the indentation load was 294 N, the strength reached the maximum value of 360 MPa in the parallel direction and 399 MPa in the perpendicular direction. The laminated ZrB2-SiC/Graphite ceramics exhibited an evident rising R-curve behavior in both directions, which was mainly attributed to the consumption of fracture energy by crack deflection and crack branching at the weak graphite layers.

引用

页码：6612 / 6617

页数：6

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