摘要
分别采用自行研制的多功能微弧等离子喷涂和传统的Metco 9M等离子喷涂制备了Al2O3＋13％TiO2（简称AT13）涂层，利用扫描电镜、X射线衍射仪以及显微硬度计等分析测试了AT13涂层的组织结构和性能，探讨了枪内中心轴向送粉方式对AT13涂层性能的影响。结果表明，多功能微弧等离子喷涂枪内中心轴向送粉方式制备的AT13涂层粉末粒子熔化充分，涂层主要物相为α—Al2O3、γ-Al2O3、Al2TiO5、ZrO2和CeO2等，显微硬度分布范围为975～1441MPa，平均结合强度为42．7MPa；而Metco 9M等离子喷涂外送粉方式制备的AT13涂层中存在部分未熔纳米AT13粉末粒子，主要物相有α-Al2O3、γ—Al2O3、Al2TiO5、TiO2、ZrO2和CeO2等，显微硬度分布范围为655～946MPa，平均结合强度为19．7MPa。结果显示多功能微弧等离子喷涂采用枪内中心轴向送粉能够制备出更加优异性能的AT13涂层，有利于拓宽AT13涂层在工业领域中的应用。
Al2O3-13wt%TiO2 （AT13） coatings were deposited by multi-functional micro-plasma spray and Metco 9M plasma spray, respectively. The microstructures and the performances of the AT 13 coatings were examined by scanning electronic microscope （SEM） and X-ray diffraction （XRD）. The effects of the different axial feeding manners on the performances of AT13 coating were investigated. The research results show that the powder particles in AT13 coating were fully melted upon adopting multi-functional micro-plasma spray which used axial internal injection feeding. The coating is dense and uniform, composed of the phases such as α-Al2O3, γ-Al2O3, AlETiO5 ZrO2 and CeO2 etc, its hardness is 975-1441 MPa, the average bonding strength is 42.7 MPa. While the powder particles in AT13 coating were partially melted upon adopting Metco 9M plasma spray which used external injection feeding, the coating is composed of α-Al2O3, γ-Al2O3, AlETiO5, TiO2, ZrO2 and CeO2 etc, its hardness is 655-946 MPa, the average bonding strength is 19.7 MPa, It is revealed that the performance of the coating by multi-functional micro-plasma is better than that by Metco 9M plasma spray.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期2061-2064,共4页
Rare Metal Materials and Engineering
