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文章编号:1004-0609(2012)06-1605-11 锆合金第二相研究述评(Ⅱ):Zr-Sn-Nb-Fe系合金 邱日盛,栾佰峰,柴林江,周 宇,陈建伟 (重庆大学 材料科学与工程学院,重庆 400044) 摘 要:对国内外关于Zr-Sn-Nb-Fe系新锆合金中第二相粒子的研究情况进行评述,并重点探讨不同种类Zr-Nb-Fe析出相的成分,晶体结构及其形成机制和条件...-Nb-Fe新锆合金；第二相；Zr(Nb, Fe)2；(Zr, Nb)2Fe 中图分类号:TG146.4 文献标志码:A Review of second phase particles on zirconium alloys (Ⅱ): Zr-Sn-Nb-Fe alloys......
of Technology, Zibo 255049, China) Abstract: Direct electrodeoxidation was used to prepare metal zirconium in a CaCl2-NaCl melt at 800 ℃ and 3.1 V, using sintered ZrO2 pellets as cathode, and high pure...文章编号:1004-0609(2007)06-1019-05 直接电脱氧法制备金属锆 郭春芳,董云会,于先进,李德刚,张丽鹏 (山东理工大学 化学工程学院,淄博 255049) 摘 要:在800 ℃下的CaCl2-NaCl混合熔盐中,以烧结后的ZrO2片体作阴极,高纯石墨碳棒作阳极,在工作电压3.1 V时,采用直接电脱氧法制备金属锆.研究不同烧结温度和压实压力对阴极片体的微观......
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升高,合金应力腐蚀敏感指数降低,说明Zr元素有利于减小合金应力腐蚀开裂倾向.Zr改善应力腐蚀性能的原因是:Zr是一种吸氢材料,在合金中添加Zr之后,能吸收金属内部的氢组成锆-氢化合物,金属中氢减少,可以减弱材料的氢脆程度[12-14]；添加Zr元素的合金晶界无沉淀析出(PFZ)变宽,晶界析出相断续分布[15]；根据Day等的理论,小角度晶界比大角度晶界更有利于抗应力腐蚀性能提高[5],合金中添加... Zhihong, et al. Effect of minor Sc and Zr addition on microstructure and properties of ultra-high strength aluminum alloy[J]. Trans Nonferrous Met Soc China, 2014, 24: 3866-3871. [8] WAGNER J A, SHENOY N......
:A Influence of Ti and Zr on cold metal transfer in-situ welding properties of aluminum alloy LEI Yu-cheng, LI Xue, CUI Jian, HU chao (School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China) Abstract: In order to study the effect of in-situ alloying welding on aluminum alloy joint, the cold metal transfer (CMT) in-situ welding test with the addition of Ti, Ti and Zr mixed......
浓度, 从而控制非均相沉淀反应过程. 图4所示为当锆盐浓度为0.2mol/L, 加料速度为6mL/min及pH为4~5条件下连续加料不同时间所得前驱体颗粒的粒径分布图. 由图4可知, 随着反应时间的延长, 颗粒逐渐变大, 粒径分布逐渐变宽. 在反应初期, 体系过饱和度较高, Zr(OH)4晶核生成速率远大于生长速率, 生成的晶核由于较高的比表面能而迅速团聚成一次粒子, 一次粒子发生碰撞团聚, 形成粒径更大的氢氧化锆颗粒, 这一阶段颗粒粒径分布较集中, 粒径较小. 随着反应时间的延长, 不断流入反应器的反应物溶液除一部分形成Zr(OH)4晶核外, 其余均参与异相成核生长, 导致粒径分布逐渐变宽. 图4 反应时间对前驱体颗粒粒径分布的影响 Fig.4 Effect of reaction time on precursor particle size......
Al3Zr phase as well as equilibrium Al3Zr phase. If the amount of Zr addition is too high, coarse primary Al3Zr dendritic phases will form and aggravate the mechanical properties of the Al alloys [1.... As a result, the strengthening effect through Zr addition does not appear in the high-temperature heat-treated alloys. SEM images of the tensile fracture surfaces of both as-annealed and simulated brazing......
Antioxidation Study of Sm(Co, Cu, Fe, Zr)z-Sintered Permanent Magnets by Metal Injection Molding Tao Siwu1,Qu Xuanhui1,Tian Jianjun1,Zhang Shengen1 (1.School of Materials Science and Engineering... solution is not suitable for metal injection molding (MIM) because it severely damages the magnetic properties and microstructure of Sm(Co, Cu, Fe, Zr)z-sintered magnets. SA solution can not only......
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