Transactions of Materials and Heat Treatment

Title：Investigation on interface reaction in continuous SiC fiber reinforced titanium composites

Authors： Li Hu Huang Xu Huang Hao Wang Minjuan Xie Chuan

Unit： Beijing Institute of Aeronautical Materials

KeyWords： titanium composites SiC fiber interface reaction

ClassificationCode：

year,vol(issue):pagenumber：2016,41(4):103-108

Abstract：

It was studied the interface reaction rate and product in continuous SiC fiber reinforced Titanium composite. The continuous W core SiC fiber reinforced Ti17 composite was fabricated by HIP technology through matrix-fiber coated method, and then the composite was exposed to various temperatures and time. The thickness of the interface reaction layer, the chemical component and the reaction product of the interface were observed and analyzed by Scanning Electron Microscopy(SEM), Transmission Electron Microscopy(TEM) and Energy Design Suite(EDS). The results demonstrate that the carbon coating can protect the SiC fiber efficiently, and the main elements in the interface reaction layer are Ti and C. Furthermore, the interface reaction product of as-processed sample is TiC1-x , which has a fine grain size near the carbon coating and coarse grain size near the matrix. Thus, the interface reaction and its layer thickness increase after thermal exposure, the growth of the interface layer obeys parabola law, and the kinetic parameters are frequency factor k0=1.33×10-3 m·s-1/2 and activation energy Q=243.22 kJ·mol-1， respectively.

Funds：

科技部国家重点基础研究发展计划资助项目（2007CB613803）

李虎（1989-），男，硕士研究生

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