标题：Microstructure and wear properties of laser clad TiB_2 + TiC/Fe composite coating (Review)
作者：Wang, X.H.;Zhang, M.;Du, B.S.;Li, S.
作者机构：Key Laboratory for Liquid-Solid Structural Evolution, And Processing of Materials, (Ministry of Education), Shandong University
来源：Surface review and letters
关键词：composite coatings;laser cladding;TiB_2TiC;wear properties
摘要：Iron-based composite coatings reinforced with TiB 2TiC multiple ceramic have been fabricated from a precursor of B 4C, TiO 2 and Al powders by laser cladding. The effect of TiO 2 and Al on the microstructure and wear properties of the coatings was investigated. The results showed that the volume fraction, type and size of the reinforcements were influenced by the content of TiO 2 and Al. TiB 2 and TiC were evenly distributed in the coating; however, most of Al 2O 3 were ejected from the coatings, only few of them retained in the coating acting as nucleation core of reinforcement or inclusion. The microhardness and wear resistance of the coatings were improved, whereas the friction coefficients of the coatings were considerably lower than that of substrate.