钛铝基自润滑材料的宽温域摩擦学特性研究

项目名称： 钛铝基自润滑材料的宽温域摩擦学特性研究

项目编号： No.51275370

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 史晓亮

作者单位： 武汉理工大学

项目金额： 80万元

中文摘要： 本项目从润滑剂组元、增强相及基体材料等方面设计宽温域固体自润滑材料，采用放电等离子烧结制备含Ti3SiC2、Ti2AlC、hBN、38wt.%CaF2-62wt.%BaF2、MoS2、C等复合固体润滑剂和增强相TiC的钛铝基固体自润滑复合材料，利用C和MoS2在低温段润滑、hBN和38wt.%CaF2-62wt.%BaF2在中温段润滑、Ti3SiC2和Ti2AlC在高温段润滑，以及增强相TiC来提高固体自润滑材料的耐磨性能。研究钛铝基宽温域固体自润滑材料在不同工况下多种润滑剂的协同润滑作用效应及机理，阐述其摩擦磨损机理，建立相应的界面和摩擦磨损机理模型。研究成果对性能优良的宽温域固体自润滑材料的制备、复合固体润滑剂的协调效应自润滑机理与模型的研究等都具有重要的意义。

中文关键词： 钛铝；自润滑复合材料；宽温域；摩擦特性；协同润滑

英文摘要： The project designs solid self-lubrication composites utilized in the wide temperature ranges from self-lubrication phases, enhanced phase and matrix material. The TiAl base self-lubrication composites are prepared by spark plasma sintering, which are consisted of TiAl intermetallic matrix, enhanced phase TiC prepared by in-situ synthesis, and doped & in-situ sythesized composite self-lubrication phases including Ti3SiC2, Ti2AlC, hBN, 38wt.%CaF2-62wt.%BaF2, MoS2 and C. The wide temperature range self-lubrication properties are realized by C & MoS2 at low temperatures, hBN & 38wt.%CaF2-62wt.%BaF2 at medium temperatures, and Ti3SiC2 & Ti2AlC at elevated temperatures. The synergistic self-lubrication effects & mechanisms, friction & wear mechanisms of the composite solid lubricants under different working conditions are studied. The models of interface microstructure and friction & wear mechanisms are also established. These results would be very meaningful to prepare intermetallic base self-lubrication composites with excellent self-lubrication properties in the wide temperature ranges, and investigate the synergistic self-lubrication mechanisms & models.

英文关键词： TiAl；Self-lubrication composites；Wide temperature ranges；Friction characteristics；self-lubrication