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Catalytic graphitization of polyacrylonitrile (PAN)-based carbon fibers with Fe-Cr2O3 composite coating HUANG Zhen-hua(黄振华)1, ZHOU Hai-hui(周海晖)1, 2, PENG Qi-ling(彭奇龄)1, CHEN Jin-hua(陈金华)1, 2...; Abstract: The process of electrodepositing Fe-Cr2O3 composite coating on polyacrylonitrile (PAN)-based carbon fibers and its catalytic graphitization were......
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Improvement of anticorrosion and adhesion to magnesium alloy by phosphate coating formed at room temperature NIU Li-yuan(牛丽媛), LIN Ji-xing(林继兴), LI Yong(李 勇), SHI Zi-mu(史子木), XU Lin-chao(徐临超... was developed to magnesium alloy against corrosion in aggressive environments. Firstly, a phosphate coating was formed on rinsed magnesium alloy. Then, powder painting was carried out on the phosphated magnesium......
多弧-磁控溅射法制备Ti-Si-N纳米复合涂层及涂层的结构和力学性能刘传胜1,杨种田2,杨兵1,田灿鑫1,付德君11. 武汉大学加速器实验室2. 武汉大学动力与机械学院摘 要:用内外靶配置的多弧-磁控溅射技术在单晶硅和硬质合金上制备Ti-Si-N纳米复合涂层,研究衬底偏压和Si靶溅射电流对涂层结构和力学性能的影响,经过实验参数优化,在偏压为-150 V,Si靶电流为15 A的沉积条件下,得到Si的原子分数为6.3%的Ti-Si-N纳米复合涂层.X射线衍射,X射线光电子能谱和透射电镜分析表明,涂层中含有晶态TiN和非晶Si3N4,纳米尺寸的TiN颗粒镶嵌在非晶Si3N4基体结构中.纳米硬度计测试表明涂层的显微硬度为40 GPa,摩擦学实验表明其摩擦因数为0.89,可满足Ti-Si-N纳米复合涂层的工业化......
氮粒子对Ti-Si-N岛构型演变影响的第一性原理计算刘学杰,魏怀,陆峰,吴帅,任元,银永杰,张素慧内蒙古科技大学机械工程学院摘 要:为了研究Ti-Si-N薄膜生长过程中界面的形成,采用第一性原理计算了在TiN(001)表面上3N-2Ti-1Si,4N-1Ti-1Si和4N-2Ti-1Si岛的各构型的总能量和吸附能,并且利用推移弹性带(NEB)的方法计算了各岛构型演变过程中所需的迁移激活能.计算结果表明:Ti粒子在岛内的构型是低能量的稳定结构,这种构型是由SiN相从TiN相中分离出来而形成的;在3N-2Ti-1Si,4N-1Ti-1Si和4N-2Ti-1Si 3种构型的演变方式中,3N-2Ti-1Si构型演变所需的激活能较小,更容易实现构型演变;适量地增加N粒子的沉积比例,可以使岛构型演变所需的激活能减......
Ti-Si-N纳米复合薄膜KMC仿真中有效作用势的拟合刘学杰,任元,孙士阳,谭心,贾慧灵内蒙古科技大学机械工程学院摘 要:为了准确地实现Ti-Si-N纳米复合薄膜生长过程动力学蒙特卡罗(KMC)仿真,采用简单原子之间的有效势拟合了第一性原理计算单粒子在TiN(001)表面的吸附作用和迁移行为.通过计算分别获得Ti,Si,N单粒子沉积在TiN(001)表面有效势的计算参数α,r0和u0.Ti,Si,N单粒子在TiN(001)表面吸附能和迁移激活能拟合相对误差均小于5%,Ti,Si,N单粒子在TiN(001)表面绕2N2Ti岛迁移激活能相对误差小于10%.对势Morse势可以描述简单键性的作用力,对于较复杂的键性其计算原子之间相互作用的准确度降低.关键词:复合材料;有效作用势;Ti-Si-N......
Structure and Properties of Ti-Si-N Coatings Synthesized by Combining Cathode Arc and Middle-frequency Magnetron Sputtering杨种田1,付德君21. College of Science, China Three Gorges University2. Accelerator Laboratory and Key Laboratory of Acoustic and Photonic, Materials and Devices of Ministry of Education, Wuhan University摘 要:Ti-Si-N composite coatings were......
Coating of SiC Powder with Nano YAG Phase SUN Xudong1,QIU Guanming2,Zhang Ning3,Ru Hongqiang1,Li Ying1,Cai Qingkui3 (1.School of Materials and Metallurgy, Northeastern University, Shenyang 110004...) Abstract:SiC-YAG(Y3Al5O12) ceramic composite powders were prepared by co-precipitation coating method. Mechanism of co-precipitation coating of SiC powders with Y3+ and Al3+ precursors was investigated......