我国钛及钛合金标准体系

评述了气－固、液－固、固－固等３种燃烧合成ＴｉＮ的方法，并详细讨论了各方法合成ＴｉＮ时的影响因素，结果认为固－固合成方法对氮气压力及稀释剂均不敏感，是这３种合成模式中最简单的燃烧合成ＴｉＮ技术，而气－固燃烧合成ＴｉＮ由于氮源易得，因而是最典型最常用的方法。     

自蔓燃高温合成法（SHS）制备碳化钨

研究了以Ｍｇ、Ａｌ为还原剂合成碳化钨的燃烧反应。在ＷＯ＿３－Ｍｇ－Ｃ系中，主要通过气－固反应形成Ｗ＿２Ｃ、ＭｇＯ。在ＷＯ＿３－Ａｌ－Ｃ系中，通过液－固反应形成ＷＣ、Ｗ＿２Ｃ和Ａｌ＿２Ｏ＿３。ＷＯ＿３－Ａｌ－Ｃ系的燃烧产物经热压处理后，Ｗ＿２Ｃ全部转变为ＷＣ。在燃烧反应中，Ｃ还起还原剂作用。     

燃烧合成TiAl合金结构转变动力学的端部淬火熄灭法分析

采用端部淬火熄灭法分析了蔓延工燃烧合成了Ｔｉ－５０ａｔ％Ａｌ合金中的组织结构转变动力学过程,发现合成反应从铝粉熔化处开始,合成反应表现为Ｔｉ＋Ａｌ→１／３ＴｉＡｌ３＋２／３Ｔｉ→ＴｉｘＡｌ＋（１－ｘ）Ｔｉ→ＴｉＡｌ等一系列过渡反应过程,这些反应的前期是可依赖液态反应物流动铺展进行质量传递的快速液－固型反应,可使试样温度迅速升高,为后续固－固型反应奠定良好扩展条件,由于扩散质量传递速度明显代于液相流     

用TiCl3低温化学气相沉积TiN的实验研究

从热力学分析中论述了ＴｉＣｌ３与Ｎ２在低温下反应形成ＴｉＮ的可行性、并通过ＴｉＣｌ３的制备及沉积试验，在４５０－６００℃温度范围内在钢基材上获得了ＴｉＮ的涂层。文中对实验装备与试验过程作了简介，对钢基工模具上应用ＴｉＮ涂层将起到积极作用。     

聚合物对Al-Cr2O3体系燃烧合成的影响

考究了聚合物对Ａｌ－Ｃｒ２Ｏ３体系燃烧合成过程的影响。结果表明添加聚合物不仅能使铝热反应型体系更易点燃，燃烧波蔓延速度加快，而且还能提高自蔓延燃烧温度，使Ａｌ－Ｃｒ２Ｏ３体系燃烧模式趋向式稳态平面燃烧。     

W含量及预热温度对Ti—W—C体系燃烧合成产物的影响研究

研究了W含量及预热温度对Ti-W-C体系燃烧合成产物相组成及粉末形貌的影响。研究结果表明，体系W含量减少，或燃烧之前进行预热，通过提高体系的燃烧温度，其燃烧反应机制由扩散－固溶机制转变为熔化－溶解－析出机制；结果，燃烧反应随之完全,有利于合成单相（Ti,W)C粉末，且产物粉末粒度增加，同时合成单相所需的预热温度随W含量增加而提高。     

电刷镀Ni—W过渡层与离子镀TiN复合涂层的结合力和磨损特性

研究了３Ｃｒ２Ｗ８Ｖ基体电刷镀Ｎｉ－Ｗ过渡层和离子镀ＴｉＮ复合涂层的结合力及强化机理。利用ＸＲＤ、ＳＥＭ和ＴＥＭ分析了涂层结构,用划痕法测定了涂层结合力,并测定和分析了涂层的磨损特性。结果表明：由于ＴｉＮ沉积过程中的温度效应,混合晶态的电刷镀Ｎｉ－Ｗ层发生晶化和析出强化,并形成界面扩散层和双层复合,从而使ＴｉＮ复合涂层的结合力和硬度明显提高;Ｎｉ－Ｗ过渡层对ＴｉＮ涂层起有力的支撑作用。Ｎｉ－Ｗ与ＴｉＮ复合涂层的耐磨性优于ＴｉＮ单层。     

谈降低载氟氧化铝排空损耗的途径

我国铝电解大型预焙槽采用氧化铝吸附法净化含氟烟气，经多年生产运行，干法净化载氟Ａｌ２Ｏ３排放量为３．６５－６．１６ｋｇ／ｔ（Ａｌ），与国外相比高出１－１１倍，排放量主要取决于气固分离的过滤效率，吸附料固气比和Ａｌ２Ｏ３循环次数，分析了过高损耗的原因，提出应控制在０．７－１．４ｋｇ／ｔ（Ａｌ），从而充分发挥干法净化的优势。     

自生复合材料（Al－TiB_2－TiC）的燃烧合成研究

本文研究了Ａｌ－Ｔｉ－Ｂ４Ｃ体系的燃烧合成过程，用粉末（Ａｌ、Ｔｉ、Ｂ４Ｃ）通过燃烧方法，来制备复合材料（Ａｌ－ＴｉＢ２－ＴｉＣ）．采用ＤＴＡ、ＸＲＤ和ＳＥＭ技术对复合材料的形成和结果进行了分析研究，得到如下结果：分别用８０％Ａｌ＋２０％（３Ｔｉ＋Ｂ４Ｃ），９０％Ａｌ＋１０％＋１０％（３Ｔｉ＋Ｂ４Ｃ）原料粉末，通过快速加热可得到Ａｌ－ＴｉＢ２－ＴｉＣ，在制备过程中会产生少量的ＴｉＡｌ３．     

自生复合材料（Al—TiB2—TiC）的燃烧合成研究

本文研究了Ａｌ－Ｔｉ－Ｂ４Ｃ体系的燃烧合成过程，用粉末（Ａｌ，Ｔｉ，Ｂ４Ｃ）通过燃烧方法，来制备复合材料（Ａｌ－ＴｉＢ２－ＴｉＣ）。采用ＤＴＡ、ＸＲＤ和ＳＥＭ译复合材料的形成和结果进行了分析研究，得到如下结果：分别用８０％Ａｌ＋２０％（３Ｔｉ＋Ｂ４Ｃ），９０％Ａｌ＋１０％（３Ｔｉ＋Ｂ４Ｃ）原料粉末，通过忆热可得到Ａｌ－ＴｉＢ２－ＴｉＣ，在制备过程中会产生少量的ＴｉＡｌ３．     

Hydrodynamic behavior of iron ore particles in a circulating fluidized bed reduction system

Mathematical modeling has been carried out for the hydrodynamic behavior of iron ore particles in a circulating fluidized bed reduction system. The hydrodynamic model incorporates gas-solid, solid-solid, gas-wall, and solid-wall interactions. The model predictions were compared with experimental data taken from the literature in terms of solid volume fraction and particle size distribution along the axial location under various operating conditions. Good agreement was obtained between the measured and predicted results. The results showed that the fluidization of iron ores in CFB was mainly affected by the superficial gas velocity and the solid circulation rate, while the ore inventory was less important. Hence, for uniform fluidization, the CFB system has to be operated by controlling the superficial gas velocity and the solid circulation rate rather than the ore inventory.     

原位复合法制备高强高导Cu-TiB2复合材料

介绍了固-液,固-固,液-液原位复合法制备弥散强化TiB2/Cu复合材料,并归纳总结了弥散强化铜合金的强化机理与导电机制.     

Progress in application and preparation of silver nanowires

Silver nanowires have attracted wide research attention for their excellent optical, electrical and chemical properties. Many researches were performed toward synthesizing and application of silver nanowires. The application of silver nanowires such as transparent conductive film electrode, conductive silver adhesive and nanowelding technology was introduced herein. Principles and characteristics of different synthesizing methods of silver nanowires were reviewed in this paper, including template method, liquid polyol method, self-assembly method, ultrasonic reduction method and wet chemical method. The liquid polyol method was the most available one to achieve efficient large-scale production.     

电子浴辅助阴极电弧源法合成AlN薄膜影响因素研究

研究了Ｎ２流量、阴极偏压、工作气压等工艺参数对电子浴辅助阴极电弧源法合成ＡｌＮ薄膜质量的影响规律及其原因。     

Application of reaction calorimetry to metallic systems

The application of reaction calorimetry to metallic systems is examined. Different commonly used procedures and their respective fields of application are described: (a) direct and indirect drop method with flow calorimeters, (b) solid-solid reaction calorimetry (Kleppa's and Gachon's methods), (c) dissolution calorimetry in metallic baths, and (d) precipitation calorimetry. Some examples of results on binary and ternary alloys are given as illustrations: (a) the determination of the enthalpies of formation of metallic melts with respect to concentration and temperature, (b) the measurements of the enthalpy of formation of solid compounds, and (c) the determination of phase boundaries from isothermal reaction calorimetry.     

纳米级SiC晶须的微波合成

以酚醛树脂、超细炭黑和超细ＳｉＯ２为原料，用微波加热的方法合成了直径在纳米级的ＳｉＣ晶须。用Ｘ射线衍射、分析电镜等手段对ＳｉＣ晶须进行了结构测定。比较并分析了不同的炭源和温度对ＳｉＣ晶须性能的影响．     

AlB2成相过程中的反应扩散

采用扩散偶法研究了原位烧结过程中AlB2的形成过程及成相控制环节。扩散实验表明:铝的扩散能力远大于硼的扩散能力,Al-B体系成相主要是通过Al向B扩散实现的;Al-B可以在固-固态和液-固态下发生反应生成AlB2相;固-固态下,相互接触的Al和B通过原子间相互扩散在接触处形成固溶活化区,AlB2相便在该活化区内形成。固-固态下控制Al-B反应发生的因素是Al原子穿越反应产物的扩散能力;液-固态下控制Al-B发生反应的因素是熔融态Al对固相产物的润湿性。     

Emission property of Y_2O_3-doped Mo secondary emitter

Y2O3-doped Mo secondary emitters were prepared by liquid-liquid doping and solid-solid doping,respectively.The back-scattered scanning observation result indicates that the emitter prepared by liquid-liquid doping has fine microstructure whereas that prepared by solid-solid doping has large grain size.Y2O3-doped Mo emitter with small grain size prepared by liquid-liquid doping exhibits high emission property,i.e.,the secondary electron yield can get to 5.24,about 1.7 times that prepared by solid-solid dopin...     

微焊点Cu/SAC305/Cu固-液界面反应及电迁移行为

研究了电迁移过程中Cu/Sn-3.0Ag-0.5Cu/Cu微焊点界面金属间化合物（IMC）的生长演变机制,分析了电载荷作用下固-液电迁移与固-固电迁移的区别. 结果表明,固-液电迁移过程中,随着加载时间的延长,两极IMC层厚度均增厚,且阳极IMC层厚度增长速率比阴极大;阴极侧IMC晶粒径向尺寸一直增大,轴向尺寸呈先增大后减小的变化规律,阳极侧IMC晶粒的尺寸在轴向与径向均增大;加载过程中,阳极IMC晶粒尺寸始终大于阴极;与固-固电迁移相比,固-液电迁移后,阴极侧,焊点IMC形貌更规则,且表面光滑度提高;阳极侧,固-固扩散时界面IMC晶粒形貌为多边形球状,而固-液扩散时界面IMC形貌为多边形柱状.     

Application of differential thermal analysis to solid-solid transitions in phase diagram determination

The differential thermal analysis (DTA) procedure is presented for the determination of equilibrium phase diagrams. The equilibrium solid-solid phase transition temperatures, which are needed in the construction of phase diagrams, cannot be obtained directly from the DTA data due to the superheating or undercooling during the actual DTA operation. Methods to extrapolate the equilibrium onset temperature for the solid-solid phase transitions from the DTA data are evaluated. Several practical problems in the DTA experiments and analysis are addressed.