采用小型固体火箭发动机研究了碳化铪(HfC)改性炭/炭复合材料喉衬的热化学烧蚀.借助基于最小自由能原理的NASA-CEA程序计算了燃气组成,借助化学热力学软件FactSage计算了燃气组分与碳、HfC的化学反应.结果表明,燃气中的H2O、CO2和OH是碳和HfC的主要氧化组分,使材料发生热化学烧蚀;纤维-基体界面是烧蚀的薄弱环节,烧蚀沿着界面分别向碳纤维和基体方向推进.热化学作用(氧化)造成纤维变细,顶端呈锥状,基体变薄,呈壳状.
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