期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 37, 期 2, 页码 865-869出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.09.003
关键词
B4C composites; Reactive hot pressing; Microstructure; Toughening mechanism; Composite structural toughening phase
资金
- Natural Science Foundation of Hebei Province [E2016402035]
- National Natural Science Foundation of China [51405131]
High-performance B4C composites toughened by TiB2-SiC agglomerates were fabricated via reactive hot pressing with B4C, TiC and Si as raw materials. The TiB2-SiC composite serves as a composite toughening phase formed in the B4C matrix through an in situ reaction; its agglomerates are composed of interlocked TiB2 and SiC, which can remarkably improve the toughness of the B4C composites. The Vickers hardness, flexural strength and fracture toughness of the B4C-TiB2-SiC composite reached 35.18 +/- 0.45 GPa, 567 +/- 14 MPa, and 6.38 +/- 0.18 MPa m(1/2) respectively. The special toughening structure of the TiB2-SiC composite introduced into B4C ceramics was evaluated for the first time in this study. (C) 2016 Elsevier Ltd. All rights reserved.
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