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High purity Al 2 O 3 ceramic friction and wear material has high hardness, wear resistance, high temperature resistance, corrosion resistance and long life, excellent performance, subject to the application of ceramic yarn guide and ceramic motor shaft research background, Al 2 O 3 rich source of raw materials, low price, good mechanical properties, characteristics, preparation out to meet the project's performance indicators of high purity Al 2 O 3 ceramic materials, the analysis of the mechanical properties of the impact of material factors, investigate the friction and wear mechanisms and the establishment of The relationship between the material surface roughness and friction coefficient of the factors that affect the friction and wear properties has been systematically studied, specifically mentioned 3GMC (Three Kinds of Grain Microstructure Ceramic) low tribology of the microstructure of the material design principles. First study the impact on the mechanical properties of the moldings and molding pressure, dry-pressed and cold isostatic molding effect compared and studied under dry pressing, different pressure on the material properties. Two additive system Al 2 O 3 ceramic material: one is in the sintering process to form a liquid phase of MgO-SiO 2 The-Al 2 O 3 system materials, and the other one is to form a solid solution with Al 2 O 3 substrate The ZrO 2 toughened Al O 3 system materials. Overall, the latter is a more excellent overall performance, mainly because the ZrO 2 phase transformation toughening and ZrO , 2 particle particle dispersion strengthening toughening. Do a systematic study of the friction and wear properties of internal and external factors affecting the material. Play a leading role in its internal mechanical properties of the tribological properties of the material microstructure is also an important factor; external factors, load and speed is the most important factor. Friction and wear mechanisms of the two systems, materials, MgO-SiO 2 -Al 2 O 3 system material for its friction wear mechanism is abrasive wear and fatigue wear and tear; of ZrO 2 toughened Al 2 O 3 system materials, the wear mechanism is mainly grinding Abrasive and adhesive wear, and the wear performance of the latter than the former, mainly due to the mechanical properties of the latter material, strong toughness, not easy to pull out the grain, occurring is slight wear. Establish a corresponding relationship between the surface roughness and friction coefficient, and that the surface roughness of the material is smaller, friction coefficient is lower, and referred to the material having a low coefficient of friction microscopic tribological having 3GMC microstructure design concept.
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