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富Si合金中最主要的缺陷形式.究其原因是由于Si,Mo原子之间的电荷积累效应增强,相互作用增大. REFERENCES [1] ZHU C Q, KOIZUMI Y, CHIBA A, YUGE K, KISHIDA K, INUI H. Pattern formation mechanism of directionally-solidified MoSi2/Mo5Si3 eutectic by phase-field simulation[J]. Intermetallics, 2020, 116: 106590. [2] PAN Y, GUAN W M. Exploring the structural stability and mechanical properties of TM5SiB2 ternary silicides[J]. Ceram Int, 2017, 44......
合EDS(SEM,FEI Nova NanoSEM 450型),以及拉曼光谱仪(Jobin-Y’von LabRAM HR-800型,He-Ne激光532 nm,数据采集区间为100~600 cm-1,测试分辨率为2 cm-1). 相关的第一性原理计算采用软件Material Studio 8.0中的CASTEP模块.在对低冰镍中的主体矿相镍黄铁矿(Fe5Ni4S8)和斑铜矿(Cu5FeS4)的晶...; (7) Fe5Ni4S8 =Fe5-xNi4-yS8-z+xFe2++yNi2++zS0+2(x+y)e (8) 该反应式与朱慧慧等[41]所推断的镍黄铁矿氧化过程的反应式相一致. 将Cu5FeS4与Fe5Ni4S8中各组元的PDOS的最高峰进行比较,Cu5FeS4中的Fe......
]. Hydrometallurgy, 1983, 11(1): 61-78. DOI: 10.1016/0304-386X(83)90016-6. [2] LUO W, FENG Q, OU L, ZHANG G, CHEN Y. Kinetics of saprolitic laterite leaching by sulphuric acid at atmospheric pressure... dust slurry [J]. Hydrometallurgy, 2013: 34-41. DOI: 10.1016/j.hydromet.2013.08.011. [8] RUSEN A, SUNKAR A S, TOPKAYA Y A. Zinc and lead extraction from Cinkur leach residues by using hydrometallurgical......
程中的反应情况,结果表明,钛铁矿从500 ℃左右就开始发生还原反应. 图3 氢气还原未反应核模型示意图 Fig. 3 Schematic diagram of hydrogen reduction unreacted nuclear model 2.1.3 金属热还原 DELGADO等[40]证明了JSC-1A月壤模拟物与Mg的混合物是可燃的.这些混合物中的Al(Mg)热剂型反应可用于在月球上...物熔化的温度下进行,使高温离子向它们各自的电极移动.这种方式可以生产Al,Mg,Li,Na和稀土金属,与众不同的是,该工艺能够原位电解月壤,在一个电极上产生纯O2,并在另一电极上产生多种液态金属,而无需任何形式的支持电解质. 图5 熔融氧化物电解法示意图 Fig. 5 Schematic diagram of molten oxide electrolysis SIBILLE等[52-53]认为......
效的把试验温度与分子动力学模拟结合起来,且定性和定量分析浇铸时间对Cu/Al多层膜结合性能的影响,为材料的系统设计与优化提供理论依据. 1 实验 运用MS建模软件构建初始原子结构模型,模型是上,下层为Cu原子,而中间层为Al原子的单晶结构.模型Cu,Al原子之间存在两个界面区,如图1所示,将模型的下界面区定义为区域Ⅰ,上界面区定义为区域Ⅱ,X方向为[100]晶向,Y方向为[010]晶向...文献[19, 21, 25],模型长度和宽度均取为10 nm.模型有423116个原子,原子的运动轨迹遵从牛顿运动定理,运动方程的数值求解采用verlet算法,时间步长设为2 fs.模型在X,Y方向采用周期性边界条件,Z轴采用自由边界条件,设Z轴为单轴拉伸方向,上层Cu薄膜的上表面和下层Cu薄膜的下表面分别固定3层原子,以组成一个界面偶.模型的原子初速度由麦克斯韦速率分布给出,本文所使用的势函数为......
automatically using random methods, and only the output weights needed to be determined first [45]. Fig. 5 ELM model structure Using the input matrix X, output matrix Y, and neuron activation function g(x... Intelligence, 2021, 97: 104015. [39] SHI Ze-yan, QUAN Guo-zheng, AN Chao, QIU Wei-yong, ZHANG Zhi-hua. Artificial intelligence model of complicated flow behaviors for Ti-13Nb-13Zr alloy and relevant......
, with accessible X-Y feature sizes in the range of 0.6-30 μm [27]. The process can be used to manufacture grade and multistructure materials with different thermal properties; 2) the process is fast, simple...] WANG X, XU S, ZHOU S, XU W, LEARY M, CHOONG P, QIAN M, BRANDT M, XIE Y M. Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants: A review [J......
on the planes parallel to the TBs. Acknowledgments This work was supported by the National Natural Science Foundation of China (No. 51871070). References [1] LU L, SHEN Y F, CHEN X H, QIAN L H, LU K. Ultrahigh strength and high electrical conductivity in copper [J]. Science, 2004, 304: 422-426. [2] MA E, WANG Y M, LU Q H, SUI M L, LU L, LU K. Strain hardening and large tensile elongation in ultrahigh......
a sequential multi-objective optimization of LDTW Al-alloy tube bending under uncertainties and verified it by the experimental design and the finite element method. With the increasing demand... of arbitrary micro-section of the pipe-wall can be obtained as , 0≤θ≤2/3π (7) where θ is the angle between arbitrary micro- section of the pipe-wall and the axis y (rad); is the outer bending moment......
alloy moulds (120 mm×20 mm×20 mm) and cylindrical moulds (Φ20 mm×20mm). Subsequently, they were placed in an electric blast dryer and dried at 60 °C for 48 h. After drying, they were demoulded and baked... of the tested beam, mm. For each composition, at least three specimens were tested, and the average was considered the representative value of the strength. The shrinkage, Y was calculated as follows......