The tensile strength and young ’ s modulus of cf / ep specimens before and after vacuum thermo - cycling were measured by an electrical universal material testing machine . an electron scanning microscope was used to perform the surface morphology and fractography of specimens 真空熱循環(huán)試驗(yàn)前后cf / ep層合材料的拉伸性能由電子萬能材料試驗(yàn)機(jī)完成,本文利用掃描電鏡觀測(cè)試樣表面形貌和拉伸后的斷口形貌。