4.7 Article

Preparation and mechanical properties of laminated B4C-TiB2/BN ceramics

期刊

CERAMICS INTERNATIONAL
卷 47, 期 22, 页码 31214-31221

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.07.297

关键词

Laminated B4C-TiB2/BN ceramics; Fracture toughness; Crack deflection; Mechanical properties

资金

  1. National Natural Science Foundation of China [52072088, 51832002, 52072089, 51972079]

向作者/读者索取更多资源

Laminated B4C-TiB2 ceramics with h-BN interface layers were successfully prepared using roll forming and tape casting techniques. Increasing the number of h-BN layers can effectively enhance the fracture toughness of the ceramics, resulting in significantly improved performance compared to monolithic B4C ceramics.
Laminated B4C-TiB2 ceramics with h-BN interface layers were successfully prepared by roll forming and tape casting, and samples with different numbers of stacked layers were obtained. Scanning electron microscopy and X-ray diffraction were used to analyze the microstructure and interlayer crystal phases of the composites, and the bending strength, fracture toughness, and work of fracture were measured. As the number of h-BN layers increased, the fracture toughness increased from 7.38 +/- 0.5 MPa m(1/2) to 9.01 +/- 0.61 MPa m(1/2), which is 2-3 times higher than that of monolithic B4C ceramics. As the fracture toughness increased, the hardness remained at a high level (31.67 GPa). Bending tests showed that cracks deflected when they encountered the h-BN interfacial layers. The toughening mechanisms included the deflection and branching of cracks and generation of new microcracks, which increased the length of the propagation path and work of fracture.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据