搜索结果: 1-15 共查到“工学 PVD”相关记录57条 . 查询时间(0.06 秒)
中国科学院力学研究所专利：一种提高大型模具PVD 膜层均匀性的方法。
2015年9月20日，中国全新研制的长征六号运载火箭成功发射，多颗卫星顺利进入预定轨道。这不仅开创了中国一箭多星发射新纪录，同时也标志着中国火箭发动机技术研制进入新纪元。
高温氧化对EB-PVD热障涂层内部应力场分布影响的数值模拟
界面 应力场 电子束物理气相沉积
2014/8/11
针对电子束物理气相沉积（EB-PVD）热障涂层（TBCs）复杂结构的特点，选用Walker黏塑性本构模型实现对其高温力学行为的准确描述.选择具有叶片曲率特征的圆管试样，并借鉴实际发动机载荷特征进行数值分析.重点考虑EB-PVD热障涂层界面的形状以及热生长氧化层（TGO）厚度变化对应力场的影响.计算结果表明，直线型界面对EB-PVD热障涂层结构的应力场改变不大，而余弦界面对EB-PVD热障涂层的应力...
一种基于LSB和PVD的图像信息隐藏方法研究
最低有效位 像素值差异 图像信息隐藏
2010/8/30
为了提高图像中秘密信息的嵌入量，提出并实现了一种基于最低有效位和像素值差异的图像信息隐藏方法。通过计算两个连续像素值的差异来判断图像的一致区域和边界区域，在一致区域使用最低有效位方法，而在边界区域使用像素值差异方法。实验结果表明，结合这两种方法后信息的嵌入量是单纯使用像素值差异方法的1.59～1.97倍，并且隐写图像具有大于38 dB的峰值信噪比，保证了隐写图像的视觉质量。
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...
Study on steel matrix composites with (Ti,Al)N gradient PVD coatings
Sintering PVD Tool materials
2009/12/14
Purpose: The paper presents investigation results of structure and properties of steel matrix composites (SMC)
uncoated and coated with hard (Ti,Al)N gradient coatings with use of physical vapour dep...
Influence of the PVD and CVD technologies on the residual macro-stresses and functional properties of the coated tool ceramics
Tool ceramics PVD CVD
2009/12/14
Purpose: The goal of this work is to compare the macro-stresses as well as mechanical and functional properties of the PVD and CVD coatings deposited on oxide and nitride ceramics tool.
Design/method...
FEM modelling of internal stresses in PVD coated FGM
Computational materials science Finite Element Method Stresses
2009/12/14
Purpose: The general topic of this paper is problem of determining the internal stresses of composite gradient tool materials with the use of finite element method (FEM). The chemical composition of t...
Purpose: of the paper was comparison of the structure, adhesion and wear resistance of the monolayers CrN and TiN PVD coatings deposited onto plasma nitrited X37CrMoV5-1 type hot work tool steel.
Des...
Stereometry specification of anodised and PVD coated surface of aluminium alloy
Metallic alloys Mechanical properties Metallography
2009/12/3
Purpose: The aim of the work is to present the influence of casting method and anodic treatment parameters on
properties, thickness and structure of an anodic layer with (PVD) physical vapour deposit...
Structure, texture and chemical composition of coatings deposited by PVD techniques
Electron microscopy PVD coatings
2009/12/3
Purpose: The aim of the research is the investigation of the structure, texture and chemical composition of coatings deposited by PVD technique (reactive dc magnetron sputtering method) onto the subst...
Purpose: The X-Ray Photoelectron Spectrometry (XPS) and Auger Electrons Spectroscopy (AES) analysis of PVD
coatings were performed for samples, made from cemented carbides, cermets and composite grad...
Corrosion resistance of multilayer and gradient coatings deposited by PVD and CVD techniques
Corrosion PVD CVD Ceramic tools materials
2009/12/1
Purpose: The aim of the research was the investigation of the corrosion resistance and structure of the TiN,
TiN+multiTiAlSiN+TiN, TiN+TiAlSiN+TiN, TiN+TiAlSiN+AlSiTiN coatings deposited by PVD proce...
Properties of the multicomponent and gradient PVD coatings
Tool materials Gradient coatings Cutting ability test
2009/12/1
Purpose: This paper presents investigation results of the properties of the multicomponent (Ti,Al)N and gradient
Ti(C,N) wear resistant coatings, deposited with the PVD process onto the substrate fro...
Mechanical properties of monolayer coatings deposited by PVD techniques
Thin&thick Coatings Residual stresses Scratch test Young’s modulus
2009/12/1
Purpose: This research was done to investigate the mechanical properties of monolayer coatings (Ti/CrN,
Ti/TiAlN, Ti/ZrN, CrN, TiAl/TiAlN, Zr/ZrN, TiN) deposited by PVD technique (reactive magnetro...