Tribological Properties of Fiber and Particle Reinforced Hybrid Aluminum Composite

纤维和颗粒增强混合铝复合材料的摩擦学性能

基本信息

批准号：
07650170
负责人：
IWAI Yoshiro
金额：
$ 1.73万
依托单位：
Fukui University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650170/
关键词：
Metal Matrix Composite MMC Fiber Reinforced MMC Particle Reinforced MMC Hybird MMC Tribology Sliding Wear Rate Wear Mode 短繊維強化複合材料ハイブリッド強化複合材料

项目摘要

(1) Tribological properties of ADC 12 die casting aluminum with fibers of Al_2O_3, and some with and Al_2O_3 particles added were investigated in a pin-on-disk test. The Al_2O_3 fibers were 4 mu m in diameter : they were added in volume fractions from 2% to 26%.and their length ranged from 200 to 40 mu m. The particles of Al_2O_3 of ranged in sizes from 0.6 to 20 mu m. The MMC (disk test piece) were rubbed against nitrided SUS440B stainless steel (pin test piece) with a load of 10N and a sliding speed of 0.1m/s.Aluninum reinforced with fibers and particles of Al_2O_3 can improve dry sliding wear resistance. Reinforcements prevented wear crack propagation and plastic flow in the initial severe wear. Increasing volume fraction of fibers improves steady state mild wear resistance, apparently by the formation of a hard surface of uniformly dispersed crushed fibers, and by oxidation of the contact surfaces to prevent adhesion.Increasing size of particles improves the wear resistance. From t … More he wear rate and SEM observations, the wear mechanism modes of MMC are divided into three types, namely ; 1.Adhesive wear dominated by matrix material, and MMCf with low volume fraction, 2.Three body abrasive wear for MMCf with high volume fraction, and hybrid MMC with small particles, 3.Two body abrasive wear for hybrid MMC with large particle diameter.(2) SiC particle reinforced Al composites were rubbed by 0.45% carbon steel using pin-on-disk apparatus in air and vacuum environments. In air, SiC particles prevent or decrease severe wear but abrade the counterface in the initial stage. The steady state mild wear rate slightly improved by reinforcements but became larger with an increase of volume fraction of particle. In vacuum (5 x 10^<-4>Pa), the wear rate of MMC,which was about 100 times smaller than that in air, was considerably smaller than that of matrix material. Particularly, the MMC with particle of 20 mu m did not wear because the wear particles transfered between rubbing surfaces. Less

(1)在销盘试验中研究了添加Al_2O_3纤维和添加Al_2O_3颗粒的ADC 12压铸铝的摩擦学性能。Al_2O_3纤维直径为4μm：按体积分数添加。 Al_2O_3的颗粒尺寸为2%～26%，长度为200～40μm。将MMC（圆盘试件）与氮化SUS440B不锈钢（针试件）进行摩擦，载荷为10N，滑动速度为0.1m/s。用纤维和Al_2O_3颗粒增强的铝可以改善。增强材料可防止初始严重磨损时的磨损裂纹扩展和塑性流动，从而改善稳态轻度磨损。耐磨性，显然是通过形成均匀分散的碎纤维的硬表面，并通过接触表面的氧化来防止粘附。从磨损率和 SEM 观察来看，磨损机理是通过增加颗粒尺寸来提高耐磨性。 MMC的磨损模式分为三种类型，即：1.以基体材料为主的粘着磨损，以及低体积分数的MMCf；2.高体积分数的MMCf的三体磨粒磨损； 3.大粒径混合MMC的双体磨粒磨损。(2)在空气和真空环境下，采用0.45%碳钢对SiC颗粒增强Al复合材料进行摩擦。空气中，SiC 颗粒可防止或减少严重磨损，但会在初始阶段磨损配合面。稳态轻度磨损率因增强材料而略有改善，但随着真空中颗粒体积分数 (5 x) 的增加而增大。 10^-4Pa)，MMC的磨损率比空气中小约100倍，明显小于基体材料的磨损率，特别是颗粒为20μm的MMC不会磨损。摩擦表面之间转移的磨损颗粒较少。