Boron nitride nanotube reinforced titanium metal matrix composites with excellent high-temperature performance

Bhuiyan, M, Wang, J, Li, L, Hodgson, P, Agarwal, A, Qian, M and Chen, Y 2017, 'Boron nitride nanotube reinforced titanium metal matrix composites with excellent high-temperature performance', Journal of Materials Research, vol. 32, no. 19, pp. 3744-3752.


Document type: Journal Article
Collection: Journal Articles

Title Boron nitride nanotube reinforced titanium metal matrix composites with excellent high-temperature performance
Author(s) Bhuiyan, M
Wang, J
Li, L
Hodgson, P
Agarwal, A
Qian, M
Chen, Y
Year 2017
Journal name Journal of Materials Research
Volume number 32
Issue number 19
Start page 3744
End page 3752
Total pages 9
Publisher Cambridge University Press
Abstract Boron nitride nanotube (BNNT) reinforced titanium (Ti) matrix composites were prepared using the cold press-and-sinter method. In the composite sintered at 800 °C for 1 h, BNNTs were homogeneously distributed in the Ti matrix and restricted the growth of Ti grains. The compressive strength of the as-sintered Ti-4 vol% BNNT composite achieved 985 MPa at room temperature versus 678 MPa without the BNNT reinforcements. The highest compressive strength of 277 MPa at 500 °C was obtained from the Ti-5 vol% BNNT composite. When sintered at 1000 °C, chemical reactions occurred between Ti and BNNTs leading to the formation of the interfacial TiB phase, which serves as a strong binding between BNNTs and the Ti matrix. The reinforcements were attributed by a mixture of BNNTs and TiB after sintering at 1000 °C for 3 h. However, no BNNT was observed in the microstructure after sintering at 1100 °C for 3 h due to complete transformation into TiB whiskers.
Subject Metals and Alloy Materials
Copyright notice © Materials Research Society 2017
ISSN 0884-2914
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