欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
对原位热压烧结制备的（ZrB2 ＋ZrC）/Zr3[Al （Si）]4C6复相陶瓷在1000～1300℃空气中的恒温氧化行为进行研究.结果表明：随着氧化温度的升高和氧化时间的延长,复相陶瓷的氧化增量和氧化速率均逐渐增大,材料的氧化过程遵循抛物线规律.ZrB2＋ ZrC的引入降低了材料的抗氧化性能,复相陶瓷的氧化层表面主要由m-ZrO2、少量t-ZrO2和莫来石组成,疏松多孔,未能形成有效阻止氧扩散的致密氧化膜.在相同氧化温度和氧化时间下,（ZrB2＋ZrC）/Zr3[Al（Si）]4C6复相陶瓷的单位面积氧化增量、氧化速率以及氧化层厚度均大于单相Zr3[Al（Si）]4C6陶瓷。
英文摘要：
The isothermal oxidation behavior of （ZrB2＋ZrC）/Zr3 [ Al（Si）]4C6 composite prepared by in situ hot-pressing at 1 000-1 300℃ in air was investigated. With the increase of oxidation temperature and time, the oxidation weight gain and oxidation rate of the composite increased gradually, and the oxidation kinetics of the composite generally followed a parabolic law. With the incorporation of （ ZrB2 ＋ZrC ） , the oxidation resistance of the composite becarae poor. The surfaces of the oxide layer had a loose and porous structure, consisting of mainly m-ZrO2, a little t-ZrO2 and mullite, and there were no dense oxide films preventing the inward diffusion of oxygen element effectively. At the same oxidation temperature and time, the weight gain per unit surface area, oxidation rate and oxide thickness of （ZrB2 ＋ZrC）/ Zr3 [ Al（Si） ] 4C6 composite were higher than those of monolithic Zr3 [ Al（Si） ]4C6.
同期刊论文项目
同项目期刊论文
期刊信息
位置：