Effect of Microstructure on the Ballistic Performance of Alumina
Results of a study of various dense Al2O3 bodies using a 22-caliber fragment simulator are presented showing that there is no significant correlation of ballistic performance with static tensile strength, surface finishes or single crystal orientations. In poly crystalline alumina a limited reduction in performance occurred with increasing grain size and a larger reduction was associated with certain impurities. The effect of impurities depends on their state and thus on methods of addition and thermal histories. Results are discussed in terms of possible microplasticity.
KeywordsFlexural Strength Ballistic Performance Areal Density Commercial Alumina Ballistic Limit
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