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matrix composite; wear mechanism; friction; hardness 1 Introduction Recently, the in-situ aluminum matrix composites (AMCs) have been applied widely as potential materials in automobile, aerospace... at room temperature in the air atmosphere under a relative humidity of 30%-40%. The test pins are 9 mm in diameter and 15 mm in length. The counterpart discs were made of CGR15 steel with hardness......
deposited on WC-Co cemented carbides by cathode arc evaporation and then annealed at 900℃ in vacuum for 0.5-4h. X-ray diffraction (XRD) and Vickers hardness tester were used to study the effect of Al content on the structure, hardness and thermal stability of TiAlN coatings. The results show Ti0.5Al0.5N and Ti0.45Al0.55N exhibit single-phase face-centered cubic structure, while Ti0.4Al0.6N......
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controlling the hot pressing sintering process, the effects of sintering temperature, pressure, holding time on the density, hardness and micro structure of the alloy materials were investigated. The results show that W-Mo-Cr alloy materials with high density and high hardness can be prepared by the method of mechanical alloying combining with hot pressing solid phase sintering, and the component......
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Microstructure and nanoindentation hardness of Ag/Fe multilayers ZHU Xiao-ying(朱晓莹)1, 2, LIU Xue-jing(刘雪敬)1, ZENG Fei(曾 飞)1, PAN Feng(潘 峰)1 1. Laboratory of Advanced Materials, Department.... Their microstructure and hardness were investigated using XRD, TEM and nanoindentation. The fcc/bcc type multilayers show a textured polycrystalline growth with Ag (111) and Fe (110) in Ag layers......
纳米压痕法测量Cu膜的硬度和弹性模量黎业生1,汪伟2(1.江西省赣州市江西理工大学材料与化学工程学院2.中国科学院 金属研究所 材料科学国家(联合)实验室)摘 要:利用纳米压痕技术对沉积在Si衬底上1μm厚Cu膜的硬度H和弹性模量E进行了测量.结果表明,由单一刚度测量(SSM)和连续刚度测量(CSM)2种方法测得的E值基本一致.然而由于Cu膜的室温蠕变行为显著,用SSM方法测得薄膜的H值显著小于用CSM方法测得的H值.对加载曲线进行分析表明,在压入深度为528-587 nm时薄膜硬度显示基体效应,压入深度与薄膜......
magnetron sputtering (IBAMS). The microstructure was characterized by FESEM, AFM and XRD analysis. The effects of ion bombardment energy on microstructure, grain size, hardness and fracture toughness... and the other is thermal effect leading to grain growth. Both the hardness and fracture toughness increase with the energy increasing from 0 to 800V, which could relate to the decrease of grain size......
Effect of ultrasonic field on particle distribution and hardness of SiCp/7085 composites WANG Kun1, JIANG Ripeng2, ZHANG Lihua1, LI Ruiqing2, LI Xiaoqian1 (1. School of Mechanical and Electrical... and ultrasound vibrations method, and the influence of ultrasonic vibration time and power on microstructure and Brinell hardness(HBS) of the composites was studied. The results show that mechanical......
hardness and corrosion resistance. The results show that a solidification-melting process occurs on the surface of AZ31 magnesium alloy when it is aluminized at 480 ℃. Mg17Al12 and Mg-Al supersaturated solid solution exist in the aluminized coating, and the coating nanoindentation hardness is about 3 times higher than that of AZ31 magnesium matrix, at the same time the corrosion resistance is improved......
