激光定向能量沉积Ti/ZrO2-Al2O3梯度材料的制备及组织性能探究
Preparation,microstructure and properties of Ti/ZrO2-Al2O3 gradient materials by laser directed energy deposition
夏熙珍 1刘冰 2李瑞迪 1赖端 3刘鑫炎 3侯亚平4
作者信息
- 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
- 折叠
摘要
选用激光定向能量沉积技术制备了 Ti金属/ZrO2-Al2O3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 ZrO2陶瓷粉末中Al2O3含量对材料组织性能的影响.结果表明,随着Al2O3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Al2O3含量的增加会导致样品中陶瓷区域硬度增加,当Al2O3含量为30％时,硬度值最高达到1 344.5HV0.2,但在结合区只有当Al2O3含量增大至30％时硬度明显提升,达到1 187.3 HV0.2.
Abstract
Ti/ZrO2-Al2O3 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 Al2O3 con-tent in ZrO2 ceramic powder on the microstructure and properties of the material was explored.The results show that with the increase of Al2O3 content,the mixing of the two phases is more uniform,while the cracking phenom-enon is more serious at the interface.The hardness of ceramic region in the sample also increases as the Al2O3 content increases.When the Al2O3 content is 30％,the hardness reaches 1344.5HV0.2,but in the binding region,the hardness increases significantly,reaching 1187.3HV0.2,only when the Al2O3 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Key words
laser deposition/metal/ceramic gradient material/interface combination/powder composition/tissue morphology引用本文复制引用
出版年
2024
NETL
NSTL
万方数据