Fabrication of TiC/TiB/Ti3AlC2 phases reinforced coatings on Ti-6Al-4V substrate |
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| Authors: | H X Zhang J J Dai C X Sun Z W Ma X Y Wang J J Du |
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| Affiliation: | 1. Key Laboratory of New Metallic Functional Materials and Advanced Surface Engineering in Universities of Shandong, Qingdao Binhai University, Qingdao, P. R. Chinazhanghongxiaedu@126.com daijingjie1979@163.com;3. Key Laboratory of New Metallic Functional Materials and Advanced Surface Engineering in Universities of Shandong, Qingdao Binhai University, Qingdao, P. R. China |
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| Abstract: | Intermetallic matrix composite coatings reinforced by TiC, TiB2, and Ti3AlC2 were fabricated by laser cladding the mixed power Ti, Al, and B4C on the Ti-6Al-4V alloy. X-ray diffraction, scanning electron microscope, and energy dispersive spectroscopy were chosen to investigate the structures and morphologies of the coatings. Results showed that the coatings mainly consisted of the reinforcements of TiC, TiB2, and Ti3AlC2 and the matrix of Ti3Al, TiAl, TiAl3, and α-Ti. The hardness and wear-resisting property of the prepared specimens of Ti-45Al-10B4C and Ti-45Al-20B4C were studied contrastively. It was found that the coating was metallurgical bonded to the Ti-6Al-4V substrate. The micro-hardness and dry sliding wear-resisting properties of the specimen of Ti-45Al-20B4C were enhanced further. And the micro-hardness of Ti-45Al-20B4C was from 900 HV0.2 to 1225 HV0.2. The wear-resisting property of Ti-45Al-20B4C was four times as large as that of the Ti-6Al-4V alloys. |
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| Keywords: | Coatings hardness microstructure titanium wear |
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