Growth mechanism of in situ synthesized TiB{sub w} in titanium matrix composites prepared by common casting technique
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030 (China)
Titanium matrix composites reinforced with TiB and RE{sub 2}O{sub 3} (RE = rare earth metal) were fabricated by a non-consumable arc-melting technology utilizing chemical reaction between titanium, B{sub 2}O{sub 3} and RE. Microstructural characterization of in situ synthesized TiB was performed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). When the volume percentage is relatively low, the TiB shows a typical fine needle-shape due to the solidification process. The TiB whiskers have a B27 crystal structure and grow along the B27 [010] direction. Based on Density Functional Theory (DFT), the surface energies of B27 (100), (101), (101-bar ) and (001) planes were calculated. The results show that the cross sections of TiB whiskers are hexagonal and consist of (100), (101), (101-bar ) planes.
- OSTI ID:
- 21140744
- Journal Information:
- Materials Characterization, Vol. 59, Issue 7; Other Information: DOI: 10.1016/j.matchar.2007.07.016; PII: S1044-5803(07)00266-5; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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