激光定向能量沉积Ti/ZrO_(2)-Al_(2)O_(3)梯度材料的制备及组织性能探究  

Preparation,microstructure and properties of Ti/ZrO_(2)-Al_(2)O_(3) gradient materials by laser directed energy deposition

作　　者：夏熙珍 刘冰[2] 李瑞迪[1] 赖端 刘鑫炎 侯亚平 XIA Xizhen;LIU Bing;LI Ruidi;LAI Duan;LIU Xinyan;HOU Yaping(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Wuhan Second Ship Design and Research Institute,Wuhan 430205,China;Farsoon Technologies Co.,Ltd,Changsha 410221,China;Hunan Measuring Technology Development Company,Changsha 410004,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]武汉第二船舶设计研究所,湖北武汉430205 [3]湖南华曙高科技有限责任公司,湖南长沙410221 [4]湖南省计量检测研究院,湖南长沙410014

出　　处：《粉末冶金工业》2024年第5期16-24,31,共10页Powder Metallurgy Industry

基　　金：山东省自然科学基金资助项目(ZR2020ZD04);湖南省科技创新平台与人才计划资助项目(2022RC3033);湖南省自然科学基金资助项目(2022JJ90037)

摘　　要：选用激光定向能量沉积技术制备了Ti金属/ZrO_(2)-Al_(2)O_(3)复合陶瓷梯度材料,通过扫描电镜、能谱仪、维氏硬度计对其显微组织、元素分布及显微硬度变化进行了系统分析,探究了ZrO_(2)陶瓷粉末中Al_(2)O_(3)含量对材料组织性能的影响。结果表明,随着Al_(2)O_(3)含量增加,金属相和陶瓷相混合更加均匀,但界面处开裂现象更严重;混合粉末中Al_(2)O_(3)含量的增加会导致样品中陶瓷区域硬度增加,当Al_(2)O_(3)含量为30%时,硬度值最高达到1 344.5HV_(0.2),但在结合区只有当Al_(2)O_(3)含量增大至30%时硬度明显提升,达到1 187.3 HV_(0.2)。Ti/ZrO_(2)-Al_(2)O_(3) gradient material was prepared by laser directed energy deposition technology.The microstructure,element distribution and changes of microhardness were systematically analyzed by means of scanning electron microscopy,energy spectrometer and Vickers hardness tester,and the influence of Al_(2)O_(3) content in ZrO_(2) ceramic powder on the microstructure and properties of the material was explored.The results show that with the increase of Al_(2)O_(3) content,the mixing of the two phases is more uniform,while the cracking phenomenon is more serious at the interface.The hardness of ceramic region in the sample also increases as the Al_(2)O_(3) content increases.When the Al_(2)O_(3) content is 30%,the hardness reaches 1344.5HV_(0.2),but in the binding region,the hardness increases significantly,reaching 1187.3HV_(0.2),only when the Al_(2)O_(3) content increases to 30%.

关 键 词：激光沉积 金属/陶瓷梯度材料 界面结合 粉末成分 组织形貌 

分 类 号：TB333[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属切削加工及机床]