Y_(2)O_(3)掺杂ZrSiO_(4)涂层的微观组织和相结构研究  

Effect of Y_(2)O_(3) Doping on Microstructure and Phase Structure of Plasma-Sprayed ZrSiO_(4) Coatings

作　　者：王鑫[1,2] 薛召露 刘侠 邓海亮 张世宏[1,2] Wang Xin;Xue Zhaolu;Liu Xia;Deng Hailiang;Zhang Shihong(Research Center of Modern Surface and Interface Engineering,Anhui University of Technology,Ma’anshan 243002,China;Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,Anhui University of Technology,Ma’anshan 243002,China;Anhui Ma Steel Surface Engineering Technology Co.,Ltd,Ma’anshan 243000,China)

机构地区：[1]安徽工业大学现代表界面工程研究中心,安徽马鞍山243002 [2]安徽工业大学先进金属材料绿色制备与表面技术教育部重点实验室,安徽马鞍山243002 [3]安徽马钢表面技术股份有限责任公司,安徽马鞍山243000

出　　处：《稀有金属材料与工程》2022年第9期3427-3434,共8页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2019YFE0107500);国家自然科学基金(51972002);安徽省自然科学基金(1908085QE219)。

摘　　要：采用大气等离子喷涂成功制备了ZrSiO_(4)及Y_(2)O_(3)掺杂ZrSiO_(4)涂层,研究了Y_(2)O_(3)掺杂后ZrSiO_(4)涂层微观组织结构、力学性能,并研究了涂层在1300℃下的烧结行为。结果表明,等离子喷涂ZrSiO_(4)涂层主要由ZrSiO_(4)、t-ZrO_(2)、少量的m-ZrO_(2)及无定型SiO_(2)组成,而等离子喷涂ZrSiO_(4)-5%Y_(2)O_(3)涂层主要由c-ZrO_(2)、少量ZrSiO_(4)相及无定型SiO_(2)组成。相较于ZrSiO_(4)涂层,Y_(2)O_(3)掺杂略微提高了ZrSiO_(4)-5%Y_(2)O_(3)涂层的硬度和断裂韧性。在1300℃高温烧结48h后等离子喷涂ZrSiO_(4)涂层中(t,m)-ZrO_(2)和无定型SiO_(2)反应重新生成ZrSiO_(4)相,该反应伴随着体积收缩,使得涂层中存在着大量的孔隙和裂纹。相较于纯ZrSiO_(4)涂层,ZrSiO_(4)-5%Y_(2)O_(3)涂层中主要是c-ZrO_(2)相和ZrSiO_(4)相,添加Y_(2)O_(3)有助于涂层中的ZrO_(2)保持在立方相(c-ZrO_(2)),提高了ZrO_(2)的高温相稳定性。ZrSiO_(4) and Y_(2)O_(3) doped ZrSiO_(4) coatings were successfully prepared by atmospheric plasma spraying.The microstructure,mechanical properties and sintering behavior at 1300 ℃ of coatings were investigated.The results show that plasma-sprayed ZrSiO_(4) coating is mainly composed of ZrSiO_(4),t-ZrO_(2),a small amount of m-ZrO_(2) and amorphous SiO_(2) phases,while the ZrSiO_(4)-5%Y_(2)O_(3) coating contains c-ZrO_(2),a small amount of ZrSiO_(4) phase and amorphous SiO_(2).Compared with ZrSiO_(4) coating,Y_(2)O_(3) doping slightly improves the hardness and fracture toughness of ZrSiO_(4)-5%Y_(2)O_(3) coating.After sintering at 1300 ℃ for 48 h,(t,m)-ZrO_(2) reacts with amorphous SiO_(2) to form new ZrSiO_(4) phase in plasma-sprayed ZrSiO_(4) coating accompanied by volume shrinkage,resulting in a large number of pores and cracks in the coating.In contrast,c-ZrO_(2) phase and ZrSiO_(4) phase are the main phases in the ZrSiO_(4)-5%Y_(2)O_(3) coating.The addition of Y_(2)O_(3) helps the ZrO_(2) in the coating to maintain the cubic phase (c-ZrO_(2)),which improves the high-temperature phase stability of ZrO_(2).

关 键 词：大气等离子喷涂 Y_(2)O_(3)掺杂ZrSiO_(4)涂层 微观组织 力学性能 高温烧结行为 

分 类 号：TG174.442.1[金属学及工艺—金属表面处理]