中文摘要：

研究了碳纤维增强SiCN陶瓷基复合材料（C／SiCN）在真空中的拉伸蠕变行为，通过对比预热处理和未热处理的两类C／SiCN的蠕变激活能，分析了预热处理的稳定化效果，并采用X射线衍射研究了C／SiCN的蠕变相变行为。结果表明，预热处理促进了非晶SiCN基体的结晶，能明显提升C／SiCN的蠕变激活能（Q），未热处理C／SiCN的Q=51kJ／mol.而热处理后试样的Q=72kJ／mol。恒定蠕变应力能明显促进非晶SiCN基体的结晶。

英文摘要：

The tensile creep of carbon fiber reinforced SiCN ceramics matrix composite（C/SiCN） under vacuum is studied. The creep activation energy of the as-received and pre-stabilized C/SiCN is computed and compared, respectively, and the effect of pre-stabilization is analyzed. The phase transition of C/SiCN during creep is examined by Xray diffraction. The results indicate that pre-annealing promotes the crystallization of amorphous SiCN ceramics matrix, and facilitates increment of the activation energy of C/SiCN. The creep stress acted on C/SiCN accelerates the crystallization of amorphous SiCN ceramics by producing stress field within C/SiCN.