搜索结果: 46-60 共查到“知识库 材料表面与界面”相关记录425条 . 查询时间(2.749 秒)
采用多弧离子镀技术和Ti--Al合金靶及Zr单质靶的组合, 在高速钢基体上制备了(Ti,Al,Zr)N多元N梯度硬质反应膜。分别用扫描电镜、X射线衍射仪观察测定(Ti, Al, Zr)N梯度膜膜层的表面、断面形貌、成分以及相结构, 研究了(Ti, Al, Zr)N多元氮梯度硬质反应膜的组织结构和性能。结果表明, 与TiN、(Ti, Al)N、(Ti,Zr)N及(Ti, Al, Zr)N等单层硬质膜...
PECVD法制备类金刚石薄膜的摩擦学性能
材料表面与界面 等离子增强化学气相沉积 类金刚石膜 XPS 摩擦磨损
2010/12/17
采用射频等离子体增强化学气相沉积法(rf--PECVD), 在45钢表面沉积了类金刚石(DLC)薄膜, 借助激光拉曼光谱仪(Raman)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和原子力显微镜(AFM), 分析了DLC膜的键结构、表面形貌和结构特征, 用原位纳米力学测试系统测定了薄膜的硬度。以GCr15钢为摩擦副材料, 用UMT--Ⅱ摩擦磨损实验机考察了不同载荷和滑行速度条件下DLC膜...
聚乙烯吡咯烷酮对PbO2电极微结构和性能的影响
材料表面与界面 改性二氧化铅电极 聚乙烯吡咯烷酮(PVP) 电化学性能
2010/12/6
采用电沉积法制备不同浓度聚乙烯吡咯烷酮(PVP)改性PbO2电极, 通过SEM、XRD、电化学阻抗谱(EIS)和线性极化(VA)等方法表征其微结构和电化学性能, 研究了PVP对电极电化学性能的影响。结果表明, PVP的包覆和空间位阻作用可抑制晶粒生长速度和团聚作用, 使电极表面晶粒细化均匀, 微结构得以改善; 改性PbO2电极具有更低的电化学反应电阻和更高的析氧电位; 适量的PVP掺杂可有效提高电...
低温等离子体对低密度聚乙烯(LDPE)薄膜表面改性的研究
有机高分子材料 等离子体处理 低密度聚乙烯 表面改性
2010/9/29
利用低温等离子体, 以氧气为工作气体, 在工作压力为20 Pa、处理功率为30 W的条件下对LDPE薄膜进行了表面改性。用接触角、FTIR--ATR、DSC、SEM、AFM等手段对改性表面进行了分析。结果表明: 在10 s~300 s的处理时间内, 单位面积的失重率随处理时间的增加线性增大; 接触角在0~20 s内随处理时间的增加显著减小, 而在40 s~300 s的处理时间内并没有发生显著变化;...
高功率脉冲磁控溅射ZrN纳米薄膜制备及性能研究
材料表面与界面 高功率脉冲磁控溅射 氮化镐 微观结构 表面性能
2010/9/27
采用高功率复合脉冲磁控溅射的方法(HPPMS)在不锈钢基体上制备ZrN纳米薄膜, 并研究了不同的工作气压对薄膜形貌、相结构及各种性能的影响。采用SEM、XRD对其表面形貌和结构进行分析, 发现制备的薄膜表面光滑、致密, 无大颗粒, 主要以ZrN(111)和ZrN(220)晶面择优生长, 并呈现出多晶面竞相生长的现象。对薄膜硬度、弹性模量、耐磨性和耐腐蚀性的测试发现薄膜具有很高的硬度, 最高可达33...
GaN基SiTrO3薄膜的生长偏转模型和模拟研究
材料表面与界面 偏转模型 密度泛函理论 STO/GaN磁电薄膜
2010/8/15
构建了SrTiO3(STO)薄膜在GaN基底(0001)表面沿不同方向偏转10o、20o、30o、40o和50o具有不同界面结构的生长模型, 采用基于密度泛函理论的平面波超软赝势法对GaN(0001)表面外延生长不同方向的STO进行了总能量模拟计算。结果表明, 在晶格失配小的理想外延方向即[1--10]SrTiO3//[10--10]GaN的能量最高, 结构不稳定; 而随着STO[1--10]沿G...
The methodological fundaments of development state analysis of surface engineering technologies
The methodological fundaments development state surface engineering technologies
2010/6/12
The presentation of the authority methodological fundaments of development state analysis of surface engineering technologies against a background of macro- and microenvironment is the goal of that pa...
Microstructure and properties of laser surface alloyed PM austenitic stainless steel
Microstructure properties laser surface PM austenitic stainless steel
2010/5/12
Laser surface alloying is a unique method where the external alloying elements in the form of powder, past, suspension, electrolytic coatings and plasma or flame sprayed coatings are introduced into a...
Modelling of fracture process in concrete reinforced structures under steel corrosion
Modelling fracture process concrete reinforced structures steel corrosion
2010/4/12
Development of non-destructive methods of rebar corrosion control in a reinforced concrete is essentially important for a practice. Of the known approaches the most prospective are regarded those base...
The different coating technologies nowadays are more often applied to surface covering of intermediate products and industrial goods [1, 2]. The wear resistant coatings can be also form by the physica...
Mechanical behaviour characterizing and simulation of polyacrylate rubber
Mechanical characterizing simulation polyacrylate rubber
2010/1/11
Mechanical behaviour of elastomers depends strongly on crosslink density. The cross linking of rubbers and thermoplastic polymers is a well-proven process of the improvement of the thermal properties ...
激光促进乙醇氧化偶联表面反应机理
激光促进表面反应 乙醇氧化偶联 1 4-丁二醇合成 反应机理
2010/1/5
利用红外光谱（IR）和激光促进表面反应（LSSR）等技术，研究了沉淀法制得Cu2（PO4）（OH）表面上的乙醇氧化偶联合成1，4-丁二醇激光表面反应机理，结果表明：固体表面键激发是激光表面反应的有效激发模式; 乙醇在固体表面材料上的特定化学吸附态形式（－P＝O…H－CH2CH2OH）决定了反应产物的高选择性；固体材料表面晶格氧参与反应是使标题反应能够实现的一个重要因素．
Investigation of the life-time of drills covered with the anti-wear Cr(C,N) complex coatings, deposited by means of Arc-PVD technique
Cr(N,C) coatings Arc-PVD Drilling test
2009/12/14
Purpose: This research was done to study the tribological behavior of twist HS6-5-2 drills covered with Cr/CrN/CrN+Cr2N/Cr(C, N) and Cr/CrN/ Cr(C, N) coatings as well as to obtain detailed information...
Main assumptions of the foresight of surface properties formation leading technologies of engineering materials and biomaterials
Development in the field of materials Manufacturing and mechanical engineering Foresight
2009/12/14
Purpose: The purpose of this paper is presentation of the main assumptions of the foresight of surface properties formation leading technologies of engineering materials and biomaterials. That foresig...
Development of the laser method of multicrystalline silicon surface texturization
Surface treatment Photovoltaics Solar cells Multicrystalline silicon
2009/12/3
Purpose: The aim of the paper is to demonstrate a laser method of multicrystalline silicon texturization. This means creating a roughened surface so that incident light may have a larger probability o...