Journal
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
Volume 126, Issue 11, Pages 900-905Publisher
CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI
DOI: 10.2109/jcersj2.18060
Keywords
TiB2/Ti2AlN composites; In-situ reaction; Hot pressing sintering; Mechanica I properties
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Funding
- CAS Priority Research program [XDB20010300, XDA21010204]
- National Natural Science Foundation of China [21501178]
- State Key Laboratory of New Ceramic and Fine Processing of Tsinghua University [KF201517, KF201611]
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TiB2/Ti2AlN composites with different proportions were successfully fabricated through solid state reaction of Ti/Al/AlN/BN powders and subsequent hot pressing sintering. The reaction mechanism, microstructures and mechanical properties of the composites were investigated. The Vickers hardness of the samples ascended with increases in the TiB2 content and reached the highest value of 11.32 +/- 0.12 GPa at a TiB2/Ti2AlN mole ratio of 1:2 (M2T1). TiB2/Ti2AlN composites with a mole ratio of 1:3 (M3T1) and 1:4 (M4T1) exhibited the maximum flexural strength of 497 +/- 15MPa and the highest fracture toughness of 9.52 +/- 0.14 MPa center dot m(1/2), respectively, which are 1.3 times and 1.8 times that of pure Ti2AlN (MT0) ceramic. (c) 2018 The Ceramic Society of Japan. All rights reserved.
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