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diffusion, and only several alloy systems have been studied by far. For example, YOUDELIS et al [10], LI et al [11] and REN et al [12] investigated Al-Cu, Mg-Al and Ni-Al systems, respectively... the availability of the above law, it is necessary to enlarge the range of study of the alloy system. In this work, Ni-Cu system is firstly used to research the effect of high magnetic field......
matte at atmospheric pressure was described. This matte was obtained from high grade Ni-Cu matte by magnetic separation, which mainly contained Ni-Cu alloy and a small quantity of sulfides. Firstly... words: Ni-Cu matte; selective leaching; Ni-Cu alloy; cementation ____________________________________________________________________________________________ 1 Introduction Although nickel-copper......
1 Ni-Cu合金物性参数[13] Table 1 Physical Parameter of Ni-Cu alloy 2.3 数值计算方法 为了差分方便,对于相场和温度场的控制方程都采用均匀网格显示算法,即向前Euler法.引入空间步长Δx,Δy,且Δx=Δy,时间步长Δt.为了获得可靠和稳定的计算结果,空间步长Δx和时间步长Δt应满足Δx≤W0和Δt...界面能各向异性下二元Ni-Cu合金枝晶生长过程的相场法模拟[J]. 中国有色金属学报, 2011, 21(7): 1656-1663. YUAN Xun-feng, DING Yu-tian. Phase-field simulation of dendrite growth process for binary Ni-Cu alloy with anisotropy of strong......
at atmospheric pressure was researched. This matte was obtained from high grade Ni-Cu matte by magnetic separation, which mainly contained Ni-Cu alloy and a small quantity of sulfides. The effects... of the pressure leaching process[2]. And the studies on the operations and improvements of the existing Ni-Cu matte refining processes have been made[9-12]. In these works, the leaching of Ni alloy in Ni-Cu......
of dendrite growth process for binary Ni-Cu alloy with anisotropy of strong interface energy YUAN Xun-feng, DING Yu-tian (State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou... was built by coupling the solute field with temperature field, and the dendrite growth process of the anisotropy of strong interface energy of Ni-Cu alloy was simulated. The results show that the variation......
rule and Scheil’s equation, and the exact value is determined by the effect of back diffusion, the initial undercooling and the cooling rate. Key words: Ni-Cu alloy; rapid solidification; diffusion.... Application to rapid solidification of undercooled Ni-15%Cu (mole fraction) alloy shows that back diffusion effect has significant influence on the solidification ending temperature but possesses......
refinement; microtexture; Ni-Cu alloy 1 Introduction Rapid solidification of bulk undercooled melts has been extensively studied since it is a good method for the preparation of metals in metastable...%Cu alloy of 5 g was prepared by pure Ni (99.98%) and Cu (99.99%). Before the experiment, the surfaces of Cu and Ni were mechanically polished and then cleaned in an ultrasonic bath of 10% (volume......
was introduced as 1050-1150 °C. Key words: Ni-Cu alloy; hot ductility; mechanical properties; dynamic recrystallization; hot compression; formability 1 Introduction Ni-Cu alloys, sometimes known... working of a Ni-Cu alloy [J]. Metals and Materials International, 2013, 19: 11-17. [19] HUMPHREYS F J, HATHERLY M. Recrystallization and related annealing phenomena [M]. 2nd ed. Amsterdam: Elsevier......
时减小26%. 关键词:Ni-Cu合金；相场法；强制对流；枝晶生长；凝固；溶质场；温度场；流场 中图分类号:TG244 文献标志码:A Phase-field method of dendritic growth under convection YUAN Xun-feng, DING Yu-tian, GUO Ting-biao, HU... and simulate both of the single and multi-grain dendritic growth of Ni-Cu alloys in a forced flow. The results show that the fluid flow alters the local heat and solute transfer at the solidification......
低温烧结合成Ni-Cu铁氧体粉体王磊,李智东,赵昆渝昆明理工大学材料科学与工程学院先进功能陶瓷材料实验室摘 要:以新鲜鸡蛋清作为复合络合剂,利用蛋清合成Ni0.6Cu0.4Fe2O4尖晶石铁氧体粉体.此方法反应条件温和,工艺简单,成本低廉,且容易控制.通过X射线衍射仪(XRD)和透射电子显微镜(TEM)分析样...Ni0.6Cu0.4Fe2O4铁氧体粉体为纳米级的,单相的,平均晶粒尺寸约为16.31 nm,平均颗粒尺寸约为2.19μm,饱和磁化强度可达37 emu/g,平均矫顽力为68.53 Oe.关键词:Ni-Cu铁氧体;蛋清;低温烧结;粉体;工艺;......
