Cr／SiO2界面还原反应研究

利用俄歇电子能谱研究了Ｃｒ／ＳｉＯ２薄膜在热处理过程中的界面扩散反应机理、界面反应动力学过程及界面反庆产物。研究结果表明，Ｃｒ／ＳｉＯ２体系的界面还原反应主要是Ｃｒ与Ｓｉ２的反应，其还原反应产物是ＣｒＳｉ和Ｃｒ２Ｏ２物种。界面还原反 速度与反应时间的平方根成正比，其界面还原反应过程受Ｃｒ向Ｓｉ２层的扩散过程所控制，界面还原反应的表观活化能力为７２．５ｋＪ／ｍｏｌ（约０．７５ｅＶ）。     

PZT/Si薄膜的扩散反应研究

运用XPS和AES研究了PZT薄膜／Si在热处理过程中的薄膜及界面化学反应：在热处理过程中，气氛中的氧气通过PZT的缺陷通道扩散到PZT／Si界面上，并与界面上的硅发生氧化反应形成SiO2界面层。同时基底上的硅通过PZT的缺陷扩散到样品表面形成SiO2表面层。此外，在PZT／Si界面上，Ti的氧化物和Si发生还原反应，形成了TISix金属硅化物，并残留在PZT膜层和SiO2界面层中。在PZT膜层内，有机结碳和钛的氧化物发生还原反应形成了TiCx物种，并存在于PZT膜层中。     

PZT/Si界面氧化反应机理及动力学研究

运用俄歇电子能谱深度剖析和线形分析研究了PZT／Si界面氧化反应的机理和动力学过程。研究结果表明，在PZT／Si样品的热处理过程中，环境气氛中的氧可以透过PZT薄膜层扩散到PZT／Si界面，并与硅基底反应形成SiO2界面层。界面氧化反应由氧在PZT层和SiO2层中的扩散过程所控制。     

Ti/SiO_2界面反应的研究

运用俄歇深度剖析和俄歇化学效应研究了Ti／SiO2的界面还原反应。结果表明，在薄膜样品的制备过程中，金属Ti可以和SiO2发生界面还原反应，形成TiSi和TiO2物种。薄膜样品在RTA处理时，Ti和SiO2的界面反应大幅度地增加，尤其是当RTA温度高于700℃时，界面反应增加得更快。700℃温度可能是Ti和SiO2界面反应的活化温度。随着反应时间的增加，界面反应也相应增加。当Ti层的厚度增加时，也有利于Ti和SiO2的界面反应。     

Ti/Si(100)体系界面扩散反应动力学研究

采用移动边界条件下扩散问题的处理方法，综合界面反应和扩散两个过程对界面硅化物形成的影响，建立起Ti／Si（100）界面扩散反应动力学理论模型，并拟合快速热退火处理后试样界面Auger深度分析谱，得到Ti，Si在相应界质中扩散系数和表现反应活化能。研究结果表明，Ti／Si体系界面TiSi2生成经历了一个由反应动力学控制到扩散控制的过渡。Si从其晶格中解离并扩散到Ti／TiSi2界面是制约扩散过程的关键因素。     

铬对SiCp／Fe复合系统界面化学稳定性的影响

研究了SiCp/Fe复合粉末系统的界面反应过程 ,讨论了合金元素Cr对其界面化学稳定性的影响。用H2 气氛 1150℃× 1h热处理的SiCp/Fe界面反应强烈 ,形成以Fe3Si、颗粒状石墨和Fe3C为主的反应产物。Fe3Si和颗粒状石墨构成反应区 ,Fe3C在金属基体晶界形成片状珠光体。Cr进入基体后能阻碍反应过程中Fe向SiC反应界面的扩散 ,有效抑制SiCp/Fe界面反应。这种作用随基体中Cr含量的增加而增大 ,有助于提高复合系统界面化学稳定性 ,改善界面结构和性能     

PZT／Si薄膜的扩散反应研究

运用ＸＰＳ和ＡＥＳ研究了ＰＺＴ膜／Ｓｉ在热处理过程中的薄膜及界面化学反应；在热处理过程中，气氛中的气通过ＰＺＴ的缺陷通道扩散到ＰＺＴ／Ｓｉ同旧，并与界面上的硅发生氧化反应形成ＳｉＯ２界面层。同时基底上的硅通过ＰＺＴ的缺陷扩散么样品表面形成ＳｉＯ２表面层。此外，在ＰＺＴ／Ｓｉ界面上，Ｔｉ的氧化物和Ｓｉ发生还原反应，形成了ＴｉＳｉｘ金属硅化物，并残留在ＰＺＴ膜层和和ＳｉＯ２界面层中。在ＰＺＴ膜层内，有     

PZT／Si界面氧化反应机理及动力学研究

运用俄歇电子能谱深度剖析和线形分析研究了ＰＺＴ／Ｓｉ界面氧化反应的机理和动力学过程，研究结果表明，在ＰＴ／Ｓｉ样品的热处理过程中，环境气氛中的氧可以透过ＰＺＴ薄膜层扩散到ＰＴ／Ｓｉ界面，并与硅基底反庆形成ＳｉＯ２界面层，界面氧化反应由氧在ＰＴ层和ＳｉＯ２层中的扩散过程所控制。     

Ni-Cr/Ti/瓷界面反应机制

采用磁控溅射技术,在Ni-Cr合金表面溅射一层Ti薄膜作为中间层,研究了Ni-Cr/Ti/瓷界面组织结构,产物种类、分布及反应机制。结果表明:Ni-Cr/Ti/瓷界面反应复杂,界面处形成的新物相有Ti2Ni,AlTi3,TiO2,SnCr0.14OX,NiCr2O4和Cr2O3。高温烤瓷过程中,Ti与Ni以稳定的化合物Ti2Ni形式结合,同时Ti与陶瓷中Al2O3反应生成AlTi3化合物,与SnO2和SiO2发生置换反应生成TiO2,TiO2与陶瓷中氧化物结合,更好的实现了Ni-Cr合金与陶瓷的连接。     

碳纤维／铝复合材料界面化学反应产物的定量研究

设计了一种新的分析方法，采用气体体积测定法和反应气相色谱法和以测定碳纤维＝／铝复合材料界面化学反应产物Ａｌ４Ｃ３的含理，当用单位纤维表面积所生成的Ａｌ４Ｃ３（Ｉ）来表征界面反应程度时，４６０℃，５４０℃睛的动力学分析表明：Ｉ－√ｔ图线性回归系数大于０．９，由此计算的界面反应扩散激活能力４９．２０ｋｃａｌ／ｍｏｌ。     

金属/石墨界面扩散反应的AES研究

利用扫描俄歇微探针的深度分析和线形分析，研究了石墨与金属Ti,Cr之间的界面状态和相互作用。研究结果表明，样品经真空热处理后，在Ti/石墨、Cr/石墨薄膜界面上发生了界面扩散和化学反应，生成了TiC和Cr     

Interfacial Interaction in Coated Carbon Fibre Reinforced Aluminous Mg-based Composites

Four kinds of Mg alloys reinforced with carbon fibres were fabricated by a gas pressure infiltration technique. The fibres were pre-coated a SiO2 layer prior to fabrication. DifFerent microstructures and interactions in the fibre-matrix interface of these composites were observed by transmission electron microscopy （TEM）. The results showed that the interracial interaction strongly depended on the content of Al in the Mg-based matrices. The microstructure of the interface could then be controlled by adjusting the Al content of the Mgbased matrix. In addition, fibres extracted from different Mg-based matrix all had some degradation owing to the interracial reaction and the fibre-matrix interdiffusion.     

Wetting behaviors and interfacial characteristics of molten AlxCoCrCuFeNi high-entropy alloys on a WC substrate

The wettability of molten AlxCoCrCuFeNi(x is from 0 to 1.5,mol.％)high-entropy alloys(HEA)on a WC substrate was measured using a modified sessile drop method at 1823 K in an argon atmosphere.The wetting behaviors and interfacial characteristics between HEAs and WC were studied.Good wettability with final equilibrium contact angles of 0.5°-4.6° is obtained,and addition of Al deteriorates the wettabil-ity of the HEAs.The wetting of AlxCoCrCuFeNi/WC system can be roughly divided into an initially sharp spreading stage and a subsequent steady-state phase.In the first stage,the adsorption of Cr atoms at the solid-liquid interface primarily contributes to the wetting,and the contact angle drastically reduces.However,both the wetting behavior and interfacial microstructure are determined by the Al content of the HEA in the next stage.For x≤0.5,the wetting is mainly driven by the dissolution of WC,although a few reaction products of(W,Cr)2C are observed.Moreover,an obvious dissolution pit appears at the surface of the substrate.When the Al content of x≥1,the interfacial reaction is dominant in competition with the dissolution of WC,and massive reaction products precipitate at the HEA/WC interface,which leads to the formation of a continuous reaction layer.     

金刚石表面Cr金属化的界面扩散反应研究

利用直流磁控溅射法在金钢石颗粒表面沉积了厚度为１５０ｎｍ的金属Ｃｒ薄膜。ＳＥＭ研究表明在金刚石表面形成的Ｃｒ膜基本均匀,但有小的金属聚集体存在。俄歇深度剖析研究发现,在镀膜过程中Ｃｒ膜和金刚石基底间发生了显著的界面扩工用作用。相应的俄歇线形分析表明,沉积过程中在界面上发生化学反应形成了部分Ｃｒ２Ｃ３物种。溅射沉积功率对金刚石颗粒与金属Ｃｒ膜的界面反应有较大的影响,提高溅射功率可大大促进Ｃｒ元素的扩     

Sealing Interfaces of Pin in Colour Picture Tube

Interfacial geometric morphology, chemistry and microstructure have been studied by SEM,EDAX, HREM, and XPS. It is found that the oxide scale/metal interface consists of two layers.The first one is amorphous SiO2 growing inward metal matrix, and the second one under the firstlayer is TiO2 distributing in metal matrix. There is microstructural transition zone at Cr2O3/SiO2intedece, and an atomic mixed zone with 8 nm width at Si02/metal interface. The transitionzone which is saturated with Cr diffusing from oxide scale exists at the oxide scale/glass intedece.The reasons why sand-blasting process can improve bonding strength of the oxide scale and themetal are also discussed. The ideal interfaces are proposed finally.     

Diffusion bonding of Fe-28Al(Cr) alloy with low-carbon steel in vacuum

Fe-28Al(Cr) alloy and low-carbon steel were diffusion bonded in a vacuum of 10⁻⁴-10⁻⁵ Pa. The relationship of the bond parameters and shear strength at the interface was discussed. Microstructure characteristics and the reaction products at the interface were investigated by scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The thickness of the diffusion reaction layer was measured with electron probe microanalysis (EPMA). The results indicated that controlling bonding temperature 1333 K for 3.6 ks, shear strength at the interface can be up to 112 MPa. Three kinds of reaction products were observed to have formed during the vacuum diffusion bonding, namely FeAl, Fe₃Al and α-Fe (Al) solid solution. The thickness (X) of the diffusion reaction layer increases with bonding time (t) according to a parabolic law X²=6.4×10³ exp(−104.1/RT)(t-t₀) (μm²).