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首页> 外文会议>Progress in durability analysis of composite systems >Thermal and mechanical durability of graphite-fiber-reinforced PMR-15 composites
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Thermal and mechanical durability of graphite-fiber-reinforced PMR-15 composites

机译：石墨纤维增强的PMR-15复合材料的热和机械耐久性

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Earlier work, which reported relationships between compression properties and elevated temperature aging times and weight losses, also pointed out the apparent influence of surface layer formation and growth on the retention of compression properties during extended aging times. Since that time, studies have been directed toward evaluating the growth of the surface layer. This layer was found to change in its composition and features as the aging temperature changed. Microcracks and small voids initiated and advanced inward at all temperatures. Visible oxidation at the surface occurred only at temperatures above 260 deg C. Relationships between layer thickness and aging time and temperature were evaluated and empirically formulated. Then, the compression properties were graphically related to the surface layer thickness with excellent correlation. The surface layer was observed to influence the compression strength of thin samples only.
机译：较早的工作报道了压缩性能与高温老化时间和重量损失之间的关系，还指出了在延长的老化时间内表面层的形成和生长对压缩性能保持的明显影响。自那时以来，研究一直致力于评估表面层的生长。发现该层随着时效温度的变化而改变其组成和特征。在所有温度下，微裂纹和小的空隙都开始并向内推进。仅在高于260摄氏度的温度下才会发生表面可见的氧化。评估并凭经验制定了层厚度与老化时间和温度之间的关系。然后，以优异的相关性将压缩特性与表面层厚度图形化地相关。观察到表面层仅影响薄样品的压缩强度。

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