CAJ | 학술논문

通过非接触式高温变形测量系统，对高硅氧／酚醛防／隔热复合材料在单侧热流载荷作用下的温度和全场高温变形进行了精确测量，并对试样体积烧蚀后的表面微观形貌进行分析。实验结果表明，利用陶瓷板在1000℃左右对高硅氧／酚醛复合材料试件辐射加热200 s后，通过测量发现距离加热面12．62 mm处热电偶温度峰值为259℃，从而说明高硅氧／酚醛复合材料具有优良的防／隔热性能。通过DIC方法测得试样加热200 s后沿加热方向的最大位移为0．18 mm，且沿着试样加热方向位移呈现出逐渐递减的规律。通过对材料烧蚀后表面形貌微观观测和分析，发现在试样加热面上出现了凹凸不平的烧蚀坑，并出现了一层很薄的高硅氧纤维高温熔融后的硅氧化合物颗粒结晶状物质。
통과비접촉식고온변형측량계통，대고규양／분철방／격열복합재료재단측열류재하작용하적온도화전장고온변형진행료정학측량，병대시양체적소식후적표면미관형모진행분석。실험결과표명，이용도자판재1000℃좌우대고규양／분철복합재료시건복사가열200 s후，통과측량발현거리가열면12．62 mm처열전우온도봉치위259℃，종이설명고규양／분철복합재료구유우량적방／격열성능。통과DIC방법측득시양가열200 s후연가열방향적최대위이위0．18 mm，차연착시양가열방향위이정현출축점체감적규률。통과대재료소식후표면형모미관관측화분석，발현재시양가열면상출현료요철불평적소식갱，병출현료일층흔박적고규양섬유고온용융후적규양화합물과립결정상물질。
The temperature and full?field high temperature deformation of silica/phenolic composites under unilateral thermal flux were measured accurately by non?contact high temperature deformation testing systems. The surface morphology of specimens af?ter volume ablative experiment was analyzed. It is found that the temperature peak of thermocouple was 259 ℃ when the distance from the heated surface was 12.62 mm after 200 s radiation heating on the silica/phenolic composites specimen by ceramic slab un?der 1 000 ℃. It is shown that the silica/phenolic composites have good thermal protection and insulation performances. The maxi?mum displacement along the heating direction of specimen detected by DIC method is 0.18 mm after heating 200 s, and decreases gradually along the heating direction. After the analysis of ablative surface morphology of specimens, the heating surface of specimen appears uneven ablation pits. Crystalline silicon oxide particles are adsorbed on a thin layer of silica fiber after high temperature melting of silica fiber.