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, which is strongly controlled by the surface properties of soil particles. Therefore, in the process of wetting and drying, the water holding behavior of the soil is mainly affected by the microstructure... physical and mechanical properties of clay by changing or destroying the lattice structure of minerals. Instead, they exist in clay minerals at adhesion state and change the bonding state and bonding......
; 1 Introduction Diffusion processes can exert significant influence on the different properties of many alloys. Among them, titanium based alloys are used for fabrication of components... and passive layer stability of different kinds of titanium based alloys is using plasma electrolysis technique[1]. Pulsed plasma electrolytic carburizing (PPEC) technique is a relatively new group......
extensively used as orthopedic and dental implants because of excellent biocompatibility and mechanical properties. However, they were generally bioinert materials. In order to improve the bioactivity... was expected to promote the bone growth, but it sacrificed the mechanical proprieties of the titanium implant. It is crucial to seek the balance among the pore size, porosity and mechanical properties......
than the theoretical values suggest that only part of the silica fume was reacted. Another contributing reason for the reduced bulk density is the generated low Ca/Si CSH. The CSH generated from the pozzolanic reaction has a lower Ca/Si ratio than that of CSH from the cement hydration [50, 51]. It was found that the density of CSH is linearly proportional to the Ca/Si ratio. A lower Ca/Si ratio......
-Cr-P-C-Si alloy in 0.5 M H2SO4[J]. Applied Surface Science, 2006, 252(22): 7921-7924. [16] GAO Y, ZHENG Z J, ZHU M, LUO C P. Corrosion resistance of electrolessly deposited Ni-P and Ni-W-P alloys...晶晶化过程对合金耐腐蚀性影响的研究,结果表明:对于不同的合金体系,处于晶态和非晶态的耐腐蚀性能不同.一些研究表明,在某些非晶体系中(如Fe-Cr-P-C-Si[15],Ni-W-P[16]等),部分晶化的非晶合金表现出更好的抗腐蚀性能,而在另外一些非晶合金体系中,其部分晶化的非晶合金相对完全非晶合金腐蚀性能明显降低[15-17]. 高钨含量的非晶合金由于具有硬度高,模量大并且热稳定性强等优异的性能......
, 86/87: 212-217. [2] GAUTIER C, MOUSSAOUI H, ELSTNER F, MACHET J. Comparative study of mechanical and structural properties of CrN films deposited by d.c. magnetron sputtering and vacuum arc..., LEYLAND A, MATTHEWS A. Structure, mechanical and tribological properties of nitrogen-containing chromium coatings prepared by reactive magnetron sputtering[J]. Surf Coat Technol, 1999, 115: 222-229. [8......
of Nonferrous Metals Society of China, 2009, 19(5): 1174-1179. [4] DEWIDAR M M, KHALIL K A, LIM J K. Processing and mechanical properties of porous 316L stainless steel for biomedical applications [J]. Transactions of Nonferrous Metals Society of China, 2007, 17(3): 468-473. [5] CHIBA A, NOMURA N, ONO Y. Microstructure and mechanical properties of biomedical Co-29Cr-8Mo alloy wire fabricated......
Flattening behavior of copper droplets in plasma spray forming ZENG Hao-ping(曾好平) School of Mechanical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; Received... time of production[1-3]. However, the microstructure of the formed coating by this technology is significantly influenced by the droplet flattening behavior[4-5]. Hence, there has been increasing......
Soc, 1984, 67(1): 715-720. [7] PARKA K, VASILOSA B. Microstructure and mechanical properties of silicon carbide whisker/calcium phosphate composites produced by hot pressing [J]. Material Letters.... With the processing steps of opening furnace firstly and then shutting it, rice hall, as the only raw material, was carbonified to get excess quantity of Si in rice hull. After a certain catalyzer......
成形有限元模型 Fig.1 Finite element model 镁合金管材为AZ31B无缝挤压管,初始直径为44 mm,壁厚为1.8 mm,长度为110 mm.化学成分(质量分数)为:Al 2.72%,Zn 0.86%,Mn 0.21%,Ca<0.001%,Si 0.016%,Mg余量.利用电子拉伸试验机固定应变速率为0.01 s?1,分别在...弹性模量带入式(1)可知,临界起皱压应力也随之降低,结果如图4(b)所示.因此,随着温度的升高,材料屈服强度和弹性模量的降低,是导致管材抗皱能力下降的根本原因. 图4 AZ31管材的力学性能及临界起皱压应力与温度的关系 Fig.4 Relationship between mechanical properties and critical wrinkling......