Mechanical properties and ballistic behavior of LiF-added Al 2 O 3 –4wtNb 2 O 5 ceramics

摘要

For the first time, the behavior of LiF-added alumina-niobia ceramics was quasi-static and dynamically analyzed in ballistic tests. Different compositions were investigated for the compound Al2O3–4wtNb2O5–nLiF, with n ranging from 0 to 1.50wt, processed at three different sintering temperatures (1300, 1350 and 1400°C). Elastic properties, elastic wave velocities, Vickers microhardness and ballistic tests were performed according to standards. The results showed that the LiF addition benefits the Al2O3–4wtNb2O5ceramic properties, allowing to reduce by approximately 100°C the sintering temperature without impairing the ballistic performance. The Al2O3–4wtNb2O5–0.5wtLiF ceramics exhibit comparable properties to the commonly used Al2O3–4wtNb2O5ceramics.