通过超高真空磁控溅射系统制备出一系列相同调制比的VN/TiB2纳米多层膜,研究了调制周期对薄膜界面作用及机械性能的影响.利用X射线衍射分析(XRD)、扫描电子显微镜(SEM)和纳米压痕硬度计表征了薄膜的显微结构、调制结构和机械性能.结果 表明：VN/TiB2多层膜具有良好的多层调制结构,调制界面清晰,其硬度出现异常升高,明显高于单层膜的机械性能.在调制周期约为10nm时,VN/TiB2多层膜展现出
通过摩擦腐蚀试验研究CoCrMo合金在0.9％NaCl和0.9％NaCl+10gL-1BSA两种溶液中的去钝化-再钝化行为.施加钝化电位并记录在摩擦前几个周期电流随载荷和运动频率的变化,分析载荷-位移变化关系,对其数据进行线性拟合,得到的直线斜率作为去钝化速率.比较在两种不同溶液中的去钝化速率发现,在0.9％NaCl中,去钝化速率在摩擦第一个周期低于第三或第四个周期,而在0.9％NaCl+10gL
In this article, the effects of sulfuric and chromic acid anodic oxidation on intergranular corrosion of 5A90 Ai-Li alloy were investigated. Surface morphology of the oxide films were studied by scann
Previous studies demonstrated the possibility to realize fluid-drag reduction by proper biologically inspired surface texture design. The present work aimed to produce such surface textures efficiency
nc-ZrN/a-Si3N4纳米复合涂层的界面结构随复合相a-Si3N4含量的变化具有较为复杂的演变规律。在nc-ZrN/a-Si3N4纳米复合涂层中,随着复合相a-Si3N4含量的增加,ZrN与a-Si3N4界面结构将发生由柱状到无规形状的转变。上述变化导致传统材料强化机制(细晶强化、固溶强化、应力强化以及取向强化等)均难以合理解释纳米复合涂层硬度发生演变的本直。本文系统研究了nc-ZrN/a-
Nickel-iridium alloys were electrodeposited on copper substrates in a small three-electrode cell, under galvanostatic conditions. The bath solution consisted of iridium (ⅡI) chloride hydrate and nicke
Herein copolymer films of acrylic acid (AA) and octafluorocyclobutane (C4F8) for different composition are prepared on low-density polyethylene (LDPE) by pulse plasma method. The chemical functionalit
The DC53 die steel was treated by ion nitriding and plasma nitriding technique. Then the TiN/TiCN coating was deposited on the treated DC53 die steel by multi-arc ion plating . The phase and structure
真空冷喷涂是一种在室温及真空条件下通过加速气体(He,N2,O2等)加速超细粉末粒子,使粒子以一定的速度撞击基体以及已沉积涂层,进而实现涂层制备的方法。作为一种新兴的陶瓷薄膜制备工艺,其具有沉积温度低,材料无相变,以及较高的沉积效率(通常可达几百纳米至几微米每分钟)等优点,可用于10μm以下陶瓷薄膜的高效率制备。真空冷喷涂已广泛应用于各个领域,在微电子领域,已用于制备高性能的铁电薄膜(PZT,Ba
Cuprous oxide (Cu2O) has many advantages. These advantages include a direct band gap (the forbidden band gap is 2.1 eV), Earth-abundance, no toxicity, low cost and high absorption coefficients, etc. B