Plastic Deformation in Alumina by Explosive Shock Loading
Plastic Deformation in Alumina by Explosive Shock Loading
复制标题
爆炸冲击载荷引起的氧化铝塑性变形
DOI：
10.1111/j.1151-2916.1985.tb10127.x
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发表时间：
1985
影响因子：
3.9
通讯作者：
R. Graham
中科院分区：
文献类型：
--
作者：
E. K. Beauchamp;M. Carr;R. Graham
以α-Al2O3和过渡氧化铝相组成的球形氧化铝粉末为材料，在13 ~ 26 GPa的最大压力和~ 400℃的最大绝热温升下进行爆炸冲击压实。最终密度达到理论密度的90%。粉末主要通过塑性变形致密化，偶有颗粒断裂。透射电镜显示，所有相中位错密度至少为1011 cm−2，过渡氧化铝相中有广泛的孪晶。
Spherical alumina powder, composed of α-Al2O3 and transitional alumina phases, was compacted by explosive shock loading with maximum pressures of 13 to 26 GPa and a maximum adiabatic temperature rise of ∼400°C. A final density >90% of theoretical was achieved. The powder densified primarily by plastic deformation, with only occasional particle fracture. Transmission electron microscopy showed dislocation densities of at least 1011 cm−2 in all phases and extensive twinning in transitional alumina phases.