A comparison of the ballistic behaviour of conventionally sintered and additively manufactured alumina  

作　　者：Gareth James Appleby-Thomas Kevin Jaansalu Amer Hameed Jonathan Painter James Shackel Julie Rowley 

机构地区：[1]Centre for Defence Engineering,Cranfield Defence and Security,Cranfield University,Shrivenham,Swindon,SN68LA,UK [2]Department of Chemistry and Chemical Engineering,Royal Military College of Canada,PO Box 17000,Station Forces,Kingston,Ontario,K7K 7B4,Canada

出　　处：《Defence Technology（防务技术）》2020年第2期275-282,共8页Defence Technology

摘　　要：Production of ceramic armour solutions on-demand/in-theatre would have significant logistical and military advantages.However,even assuming that such technologies could be successfully deployed in the field,such near net-shape manufacturing technology is relatively immature compared to conventional sintering of ceramics.In this study,the ballistic performance of a series of additively manufactured(AM)/rapidly-prototyped(RP)alumina tiles of 97.2%of the density of Sintox FATM were investigated using both forward-and reverse-ballistic experiments.These experiments,undertaken with compressed gasguns,employed the depth-of-penetration technique and flash X-ray as primary diagnostics to interrogate both efficiency of penetration and projectile-target interaction,respectively.The RP alumina was found to exhibit useful ballistic properties,successfully defeating steel-cored(AP)7.62×39 mm BXN rounds at velocities of up-to c.a.850 m/s,while exhibiting comparable failure modes to conventionally sintered armour-grade Sintox FATM.However,where a<1%by vol.Cu dopant was introduced into the RP material failure modes changed dramatically with performance dropping below that of conventionally sintered alumina.Overall,the results from both sets of experiments were complimentary and clearly indicated the potential of such RP materials to play an active role in provision of real-world body armour solutions provided quality control of the RP material can be maintained.

关 键 词：ADDITIVE MANUFACTURE Rapidly prototyped Body armour BALLISTICS CERAMICS 

分 类 号：TJ811[兵器科学与技术—武器系统与运用工程] TQ174.758.11[化学工程—陶瓷工业]