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suspension as printing slurry followed by extrusion and in-situ curing [19]. The slurry is made of gel system and powder particles, which is designed based on the forming mechanism of gel-casting [20... was in-situ cured after the cross-linked polymerization reaction. The reaction mechanism had been systematically discussed in our previous studies [28]. The curing process was based on the HEMA monomer......
具有基体强化程度高,ZnO粒子弥散分布均匀,力学性能和电性能优良的特点.AKIRA[21]在Ag/ZnO体系中添加了Ni或Co的金属间化合物,获得了具有稳定接触电阻和良好抗熔焊性能的新型接触材料.JOSHIA等[22]的研究表明通过在Ag/ZnO体系中添加1.0%(质量分数)LiNO3改善了烧结密度,并获得了细小而弥散的球形氧化物相.SCHOEPF等[23]通过添加钨酸银(Ag2WO4)和钼酸银...平可准确测量质量变化0.1 mg以上.采用美国WYKO NT9100型三维光学轮廓仪(3DOP)观察Ag/ZnO(10)电触头材料的三维宏观侵蚀形貌；采用Sirion-200型的扫描电镜分析Ag/ZnO(10)电触头材料的二维宏观和微观电弧侵蚀形貌. 2 结果与讨论 2.1 电接触物理现象 图4所示为ASE工艺制备的Ag/ZnO(10)电触头材料在不同操作次数下电弧能量,电......
ratios of 3.1 and 6.1 at ambient temperature, and then their microstructure, texture, and Vickers hardness were investigated based on electron back-scattered diffraction (EBSD) data. The fraction...> components based on EBSD data. Key words: niobium tube; hydrostatic extrusion; microstructure characterization; mechanical properties; texture evolution 1 Introduction Nb tubes are used......
-SVM)从数据中探索这种"关系",从而建立电流效率的软测量模型.模型基本结构如图1所示. 图1 基于支持向量机的电流效率软测量模型 Fig.1 Soft-measuring model of electricity efficiency based on support vector machine 支持向量机的输入变量均采用下式进行自标准化处理: (4) 式中:xi为模型的任一输入变量的原始值..., TSATSARONIS G. Splitting physical exergy: theory and application[J]. Energy, 2019, 167: 698-707. [8] MOROSUK T, TSATSARONIS G. Advanced exergy-based methods used to understand and improve energy......
): 421-444. [3] EKLUND J, PHOTHER J, SADEGH E, et al. High-temperature corrosion of HVAF-sprayed Ni-based coatings for boiler applications[J]. Oxidation of Metals, 2019, 91: 729-747. [4] HUSSAIN T...-sprayed Ni-based chromia, alumina and mixed-oxide scale forming coatings in ambient air[J]. Surface and Coatings Technology, 2017, 316: 10-21. [8] RANA N, JAYAGANTHAN R, PRAKASH S. Stepwise oxidation......
slag coal-based direct reduction[J]. Journal of Iron and Steel Research, 2020, 32(4): 311-321. [5] HOLLAND K, ERIC R H, TASKINEN P, et al. Upgrading copper slag cleaning tailings for re-use[J.... Iron recovery from copper-slag with lignite-based direct reduction followed by magnetic separation[J]. The Chinese Journal of Nonferrous Metals, 2011, 21(5): 1165-1170. [9] 曹志成, 孙体昌, 薛 逊, 等. 铜渣转底炉直接还原磁选与......
DOI: 10.11817/j.ysxb.1004.0609.2021-36676 Ti/Ni复合中间层扩散连接钨与钢接头的断裂行为 蔡青山,段欣昀,朱文谭,王健宁,刘文胜,马运柱 (中南大学 轻质高强结构材料国家级重点实验室,长沙410083) 摘 要:复合阻隔扩散连接技术是制备高性能钨/钢异种金属结构件的有效方法.本文研究Ti/Ni复合中间层扩散连接钨与钢接头的断裂行为,分析金属间化合物和残余应力对钨/钢接头性能及断裂方式的影响.结果表明:在拉伸载荷作用下,钨/Ti/Ni/钢扩散连接接头呈现出界面断裂,反应层断裂和混合断裂等3种断裂模式；在较低的连接温度和较短的保温时间下,钨/钢接头发生W/Ti界面断裂,接头强度较低；随着连接温度升高,钨/钢接头断裂发生在钨基体和W/Ti界面的混合区域,接头强度在(950℃, 1h)时达到最高,受残余应力和界面强度共同控制；随着连接温度进......
, LLRGBUSI O J. Kinetics of silicon-metal alloy infiltration into porous carbon[J]. Composites Part A: Applied Science and Manufacturing, 2000, 31(6): 617-625. [23] 管国阳, 矫桂琼, 张增光．2D-C/SiC复合材料的宏观拉压特性和失效模式......
steel core reinforced by shape memory alloy (SMA) [16, 17] constructed BRB in form of self-centering. Although SMA can improve the system’s behavior, due to the high price of SMA... to the cross-section (for complete submission) is depending on the buckling capacity, the buckling capacity Pe is based on the AISC code: ......
orebody in Yangla copper deposit 2.1 稀土元素测试 稀土元素测试在中国科学院矿床地球化学国家重点实验室完成,所用仪器型号为德国耶拿分析仪器股份公司生产的Plasma Quant-MS Elite型电感耦合等离子体质谱仪,样品分析数据相对精度优于10%.实验流程如下:先称取粒径＜74 μm样品50 mg,放入Teflon坩埚中,加入1 mL HF和1...素实验室多接收器等离子体质谱仪(MC-ICPMS)上进行,该仪器对1 μg的铅208Pb/206Pb测量精度优于0.005%.测试过程中使用国际标准NBS 981进行监控.详细分析流程见文献[33]中所述. 2.5 Zn同位素测试 Zn同位素的化学分离和测试由北京科荟测试技术有限公司负责完成.称取150 mg左右样品于20 mL高压消解罐中,加入0.5 mL HNO3和1 mL HF......
