Research of Cf/TaC Composites Prepared by Low Temperature Chemical Vapor Infiltration (CVI) Process

doi:10.3724/SP.J.1077.2007.00287

Abstract

Abstract: TaC was deposited by a chemical vapor infiltration(CVI) method with TaCl₅-Ar-C₃H₆ system in the carbon fiber felt. The influences of temperature on CVI deposition rate, deposition uniformity, phase composition, crystallization size and surface growth morphology of TaC coating in carbon fiber felt were studied. The experimental results show that, the deposition rate increases firstly with the rising of temperature, reaches its maximum value at 950℃ and then decreases; at 900℃, the deposition uniformity is the best; the highly crystalline TaC can be deposited between 800℃ and 1000℃ and the crystalline size increases at elevated temperature; it is island-like growth model of TaC on the carbon fiber between 800℃ and 1000℃; with the rising of deposition temperature, the sizes of the deposition islands increase firstly and then decrease; the diffusion ability of the deposition islands increases, and the deposition islands link and melt each other at elevated temperature.

Key words: TaC, chemical vapor infiltration, deposition rate, microstructure growth morphology

CLC Number:

TB332

CHEN Zhao-Ke,XIONG Xiang,XIAO Peng,LI Guo-Dong,HUANG Bo-Yun. Research of C_f/TaC Composites Prepared by Low Temperature Chemical Vapor Infiltration (CVI) Process[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00287.

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Research of C_f/TaC Composites Prepared by Low Temperature Chemical Vapor Infiltration (CVI) Process

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