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by their high chemical affinity to oxygen, carbon or boron. In the metal/ceramic systems of Cu-Cr/C[8], Ag-Cu-Ti/AlN[9], Ag-Cu-Ti/SiC[10], Ni-Ti/ Al2O3[11], Cu-Ti/AlN[9], Cu-Ti/Y2O3[12], Cu-Ti/SiC [13], Cu... or CuAg alloys causes the decrease in the contact angle on Al2O3 from values much higher than 90? to 10?-20?[10]. The improvement in wetting by the addition of active elements can be explained by two......
文章编号:1004-0609(2009)06-0986-06 外加载荷对Al2O3·SiO2(sf)/AZ91D复合材料磨损性能的影响 刘贯军,马利杰,胡志刚,孔晓红,余泽通,张文庆 (河南科技学院 机电学院,新乡 453003) 摘 要:分别以硅酸铝短纤维和磷酸铝为增强体和预制体高温粘结剂,采用挤压浸渗法分别制备出体积分数为15%,20%,25%和30%的镁基复合材料.利用... velocities of 0.47 and 0.92 m/s. The effects of applied loads on the dry sliding tribological properties of Al2O3?SiO2(sf)/AZ91D composites with different volume fractions were investigated......
Ca2SiO4和Mg(OH)2；生成的Ca2SiO4具有较高的活性,浸出2 h后,其分解率可达到19.35%. 关键词:铝酸钙炉渣；MgO；C20A13M3S3；氧化铝；浸出 中图分类号:TF 803.21 文献标识码: A Synthesis and Al2O3 leaching property of 20CaO...含量提高.当体系中含有一定量的MgO时,它会和体系中的CaO,Al2O3和SiO2形成四元系化合物20CaO·13Al2O3·3MgO·3SiO2 (C20A13M3S3),该化合物在CaO-Al2O3-SiO2-MgO体系中是一个热力学稳定的化合物[4],它的存在会降低铝酸钙炉渣中Al2O3的浸出率. C20A13M3S3是高铝水泥中Q相的组成成分[5?7],这是由于它具有良好的水化性能,早期......
Microstructure of nanometer Al2O3 dispersion strengthened Ni-based high-temperature protective coatings by laser cladding WANG Hong-yu(王宏宇)1, 2, ZUO Dun-wen(左敦稳)1, SUN Yu-li(孙玉利)1, XU Feng(徐 锋)1...; Abstract: The nanometer Al2O3 dispersion strengthened NiCoCrAlY high-temperature protective coatings......
,促进原子的固态扩散,Si相小颗粒聚集长大,对材料内部孔隙填充作用加强,使材料微孔减少.相对而言,因氧的扩散有限,氧化对孔隙的填充作用更强；其次,在计算理论密度时是按铝硅二元合金进行的,实际上,合金氧化后,形成了一定量的Al2O3和SiO2,致使高温充氧氧化后理论密度计算值偏小. 表2 高温充氧氧化前后材料密度,致密度与气密性 Table 2 Density......
out on a general purpose wear testing machine having a heating unit and pin-disc sample configuration. The counterface material was prepared from Al2O3 ceramics. The tests were carried out at room...-on-disk approach was taken to measure the tribological properties of the alloys rubbing against Al2O3 ceramics. The instrument is an MG-2000 high- temperature tribometer, which runs from at room......
]. Minnesota: Perkin-Elmer Corporation Physical Electronic Division, 1979. [20]WU Gao-hui, YU Zhi-qiang, SUN Dong-li, et al. Rare-earth modification of sub-micron Al2O3 particle surface and its effect......
SP, XIA K. Nanostructured Al–Al2O3 composite formed in situduring consolidation of ultrafine Al particles by back pressure equal channel angular pressing[J]. Acta Materialia, 2009, 57: 4321-4330. [8......
Trans. Nonferrous Met. Soc. China 25(2015) 175-183 Effect of TiO2 content on properties of Al2O3 thermal barrier coatings by plasma spraying Sheng-kai JIA1, Yong ZOU2, Ji-yuan XU3, Jing WANG1, Lei... of Education, Shandong University, Jin’an 250061, China; 3. School of Energy and Power Engineering, Shandong University, Ji’nan 250061, China Received 17 February 2014; accepted 20 October 2014 Abstract: Al2O3......
of UNSS30403, S31603 and S32760 stainless steels [J]. Wear, 2007, 263: 149-159. [8] DING H Y, DAI Z D, SKUIRY S, CHUI D. Corrosion wear behaviors of micro-arc oxidation coating of Al2O3 on 2024Al......
