ZrB_2-YAG-Al_2O_3复相陶瓷的抗氧化性能  

Oxidation Resistance of ZrB_2-YAG-Al_2O_3 Multi-phase Ceramics

作　　者：宋杰光[1,2] 杜大明[1] 王秀琴[3] 白小波[1] 李养良[1] 李世斌[1,2] 纪岗昌[4] 张联盟[5] 

机构地区：[1]九江学院机械与材料工程学院 [2]九江市绿色再制造重点实验室,九江332005 [3]九江学院图书馆,九江332005 [4]九江学院九江市绿色再制造重点实验室,九江332005 [5]武汉理工大学材料复合新技术国家重点试验室,武汉430070

出　　处：《机械工程材料》2010年第5期64-67,97,共5页Materials For Mechanical Engineering

基　　金：国家“973”计划资助项目(5133102);江西省教育厅青年科学基金资助项目(GJJ09595)

摘　　要：通过共沉淀法获得包覆式Al_2O_3-Y_2O_3/ZrB_2复合粉体,对其进行放电等离子烧结制备相应的复相陶瓷,并对不同YAG(钇铝石榴石)、Al_2O_3含量的复相陶瓷进行了氧化试验,用SEM、XRD和电子探针等研究了YAG、Al_2O_3对ZrB_2陶瓷抗氧化性的影响。结果表明:制备的各种复相陶瓷和纯ZrB_2陶瓷相比,在相同氧化条件下表面的氧化层厚度都有所变薄,YAG、Al_2O_3的加入可以改善ZrB_2陶瓷的抗氧化性能;在相同氧化条件下,Al_2O_3含量越多,氧化层厚度越小;在高温条件下,复相陶瓷氧化层中均存在ZrO_2、B_2O_3和Al_(18)B_4O_(33)相,Al_2O_3含量越多,Al_(18)B_4O_(33)相也越多。The ZrB_2 coated with Al_2O_3-Y_2O_3 composite powders were obtained by co-precipitation method. The composite ceramics were prepared by spark plasma sintering（SPS） technique.Oxidation tests of the composite ceramics with different YAG（yttrim aluminum garnet） and Al_2O_3 contents were performed.The effects of YAG and Al_2O_3 on oxidation resistance of the ZrB_2 ceramics were analyzed by using SEM,XRD and EPMA.The results show that the oxide layer thickness of ZrB_2 ceramics added with YAG Al_2O_3 decreased compared to pure ZrB_2 ceramics under the same oxidized conditions.YAG and Al_2O_3 could improve the oxidation resistance of ZrB_2 ceramics.The more the Al_2O_3 content,the thinner the oxide layer thickness.Under high temperature condition the oxide layers on the composite ceramics were composed of ZrO_2,B_2O_3 and Al_（18）B_4O_（33） phase.The more the Al_2O_3 content,the more the Al_（18）B_4O_（33） phase.

关 键 词：ZrB_2陶瓷 YAG(钇铝石榴石) Al_2O_3 复相陶瓷 抗氧化性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]