摘要
钛合金表面激光熔覆氧化锆陶瓷后，在钛合金基体和氧化锆陶瓷之间形成冶金过渡层。本文采用ＳＥＭ、ＴＥＭ观察过渡层的组织形态，利用选区电子衍射技术分析各组织的相结构，采用Ｘ射线能谱仪分析过渡层内的成分分布。过渡区是由三层组成，即近热影响区胞状晶α、中间层粒状ＺｒＯ２＋α相、近熔覆区粒状ＺｒＯ２＋胞状枝晶ＺｒＯ２＋晶间α相。从热影响区到熔覆区过渡区内，塑性相α逐渐减少，相反脆性相ＺＴＯ２逐渐增加，由此证明激光溶覆技术是制备ＺｒＯ２／Ｔｉ梯度功能材料有效的工艺方法。
he metallurgic layer between the matrix of titanium alloy and the ceramic surface of Zro2 was formed after titanium alloy surf are was melted ZrO2 by laser.The structure of the layer and the composition distribution in the layer wei-e abserved and analysed by TEM,SEM and EDX.Analysis of phase structure was also carried out by special zone electron diffraction technique.The results show that transition-layer is composed of there layers:celluar crystal α near heat influence zone. ZrO2 and α with layer-grain and grainy ZrO2.cellular and arborescent ZrO2 crystal and boundary α.Within transition from heat influencezone to melting zone.Plastic α decreases and brittle ZrO2 increases gradually. Therlbre, Laser melting technique is a effective way to manufature ZrOw / Ti gradiend function materials.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
1995年第5期17-22,共6页
Rare Metal Materials and Engineering
关键词
钛合金
激光熔覆
氧化锆
涂层
显微组织
陶瓷
titanium alloy gradient function material laser melting ZrO_2 coating microstructure
