摘要
研究了 BN 纤维补强 ZrO_2 材料中显微结构及界面特性,BN 纤维与 ZrO_2基体之间有一扩散区,经烧结后复合材料中 BN 以多晶形式存在。在 BN 纤维内扩散入较多 Y_2O_3 和 SiO_2,这些组分在纤维内形成玻璃相。聚集在 ZrO_2之间的 BN 形成细长结晶体,该晶体内有较多刃位错和反相畴区域。与 BN 相邻的 ZrO_2仍为四方相。
Microstructure and character of interface in BN fibre reinforced ZrO_2 havebeen studied.A diffusive zone exists between BN and matrix ZrO_2.In composite the BN ispresent in the form of polycrystals,Y_2O_3 and SiO_2 have diffused in BN and form glassyphase.At grain boundaries of ZrO_2 appear tiny BN crystals,in which there are edge dislo-cations and antiphase domains.However,the ZrO_2 adjacent with BN still remainstetragonal phase.
基金
国家自然科学基金
5860350
