Technique for Monitoring Densification during Chemical Vapor Infiltration
Technique for Monitoring Densification during Chemical Vapor Infiltration
复制标题
化学蒸气渗透过程中的致密化监测技术
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
P. Agrawal
中科院分区：
文献类型：
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作者：
W. J. Lackey;S. Vaidyaraman;G. Freeman;P. Agrawal
本文介绍了一种研究化学气相渗透法制备复合材料致密化过程的新技术。通过在不同时间暂时中断碳渗透过程以允许沉积非常薄的SiC层来研究碳基复合材料的制备。在抛光的横截面上对这些层进行显微镜检查，可以确定预制件内不同位置处的渗透程度作为渗透时间的函数。该技术还区分开孔和闭孔，并提供有关预制件内存在温度梯度的信息。
A new technique for studying the progression of densification during the fabrication of composites by chemical vapor nfiltration is presented. The preparation of a carbon-matrix composite was investigated by momentarily inter-rupting, at various times, the carbon infiltration process to permit deposition of very thin layers of SiC. Microscopic examination of these layers on a polished cross section per-mitted determination of the extent of infiltration at various locations within the preform as a function of infiltration time. The technique also distinguishes open from closed pores and provides information on the existence of temperature gradients within the preform.