Formation of TiC via interface reaction between diamond grits and Sn-Ti alloys at relatively low temperatures. (August 2017)

• Record Type: Journal Article
• Authors: Liao, Xinjiang; Mu, Dekui; Wang, Jianxin; Huang, Guoqin; Huang, Hui; Xu, Xipeng; Huang, Han
• Is Part Of: International journal of refractory metals & hard materials. Volume 66(2017)
• Page Start: 252
• Page End: 257
• Publication Date: 2017-08
• Subjects: Brazing -- Diamond grits -- Growth morphology -- Microstructure -- Transmission electron microscopy (TEM); Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2017.04.005
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: In this paper, interfacial reaction between diamond grit and Sn-6Ti alloy was systematically studied at brazing temperatures from 600 to 1030 °C. A thin and uniform layer of scallop-like nano-sized TiC grains was formed after brazing for 30 min at 600 °C, and interfacial TiC grains subsequently coarsened as brazing temperature increased to 740 and 880 °C. Strip-like columnar TiC grains in a bilayer structure was further grown as brazing temperature increased to 930 °C. After brazing at 1030 °C, a dense layer of columnar TiC grains were formed. Based on the TEM micrographs of interfacial TiC, the formation and evolution of the growth morphologies of interfacial TiC was believed to be controlled by the diffusion of C flux from diamond grits, which is dependent on the brazing temperatures. Highlights: A continuous scallop-like nano-sized TiC layer was formed after brazing at 600 °C for 30 minutes. As brazing temperature increasing, the morphologies of interfacial TiC grains consequently coarsened columnar structure. The growth morphologies of interface TiC was believed to be controlled by diffusion of C flux from diamond grits.