Transparent Armor Ceramics as Spacecraft Windows
Transparent Armor Ceramics as Spacecraft Windows
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DOI：
10.1111/jace.12089
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发表时间：
2013
影响因子：
3.9
通讯作者：
J. Salem
中科院分区：
文献类型：
--
作者：
J. Salem
作为减轻下一代航天器窗口的计划的一部分，测量了几种透明装甲陶瓷的慢裂纹扩展参数。透明铝酸镁（尖晶石，MgAl2O4）和AlON相对于熔融二氧化硅具有优异的抗慢裂性，这是历史材料的选择。尖晶石的慢裂纹扩展、强度和断裂韧性受晶粒尺寸的显著影响，晶粒边界的富铝相和孔隙率导致粗晶尖晶石的晶间断裂。描述所需窗口寿命所需质量的函数意味着透明陶瓷可以从缓慢裂纹增长的角度减轻窗玻璃。
The slow crack growth parameters of several transparent armor ceramics were measured as part of a program to lighten next generation spacecraft windows. Transparent magnesium aluminate (spinel, MgAl2O4) and AlON exhibit superior slow crack resistance relative to fused silica, which is the historical material of choice. For spinel, slow crack growth, strength, and fracture toughness are significantly influenced by the grain size, and alumina-rich phases and porosity at the grain boundaries lead to intergranular fracture in coarse grain spinel. Functions describing the required mass for a desired window life imply that transparent ceramics can lighten window panes from a slow crack growth perspective.