摘要
以Mo-Ni-Si合金粉末为原料,使用激光熔敷技术在1Cr18Ni9Ti不锈钢基材表面制备出Mo_2Ni_3Si/NiSi金属硅化物复合材料涂层。应用OM、SEM、EDS和XRD方法分析了涂层的显微组织。Mo_2Ni_3Si/NiSi复合材料涂层由初生的Mo_2Ni_3Si三元金属硅化物树枝晶和枝晶间的Mo_2Ni_3Si/NiSi共晶组织组成。在常温和高温滑动磨损条件下测试了涂层的耐磨性能。在常温滑动磨损条件下,Mo_2Ni_3Si/NiSi金属硅化物复合材料涂层的质量损失随着载荷的增加缓慢增加;在高温滑动磨损条件下,Mo_2Ni_3Si/NiSi金属硅化物复合材料涂层的质量损失随着温度的升高缓慢下降。
Mo2Ni3Si/NiSi metal silicide composite coating was fabricated on the substrate of austenitic stainless steel by laser cladding using Ni-Mo-Si elemental powder blends. Microstructure of the coating was characterized by OM, SEM, EDS and XRD. The wear properties at room temperature and high temperature were evaluated under sliding wear conditions. Results show that the coating consists of the Mo2Ni3Si ternary metal silicide primary dendrite and interdendritic Mo2Ni3Si/NiSi eutectic structure. The coating has excellent wear resistance at room temperature and high temperature under sliding wear conditions. The wear mass loss of the coating increases very slowly with the increase of wear test load under room-temperature sliding wear test conditions, and decreases slowly with the increasing of wear test temperature under high-temperature sliding wear conditions.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2003年第4期389-395,共7页
Chinese Journal of Materials Research
基金
国家自然科学基金No.50071004
教育部跨世纪优秀人才培养计划基金
国家高技术研究发展计划No.2002AA331030
北京市自然科学基金No.2022012
航空基础科学基金No.O2H51011
关键词
复合材料
激光熔敷
滑动磨损
金属硅化物
涂层
Cladding (coating)
Coatings
Laser applications
Molybdenum compounds
Nickel compounds
Silicon compounds
Wear resistance
