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Cu6Zr5, the basic cluster of the primary devitrification phase of Cu-based amorphous alloys, is selected as cluster model based the on structure heredity existing between amorphous alloys and primary devitrification phases.

根据非晶与其晶化相存在结构遗传关系,以Cu-Zr基非晶晶化相Cu10Zr7中的Cu6Zr5阿基米德反棱柱为团簇模型,利用离散变分方法从电子层次研究了Al元素对Cu基非晶合金团簇稳定性的影响。

Sponge zirconium was employed as raw material to prepare wedge-like specimens of Zr52.5Cu17.9Ni14.6Al10Ti5 quinary alloy by a tilt casting method using ladle-hearth-type arc furnace. The effect of active element Sc on the glass forming ability and crystallization kinetic parameters of the quinary alloy is investigated.

摘 要:以海绵锆为原材料,利用浇包型坩埚电弧炉倾斜铸造法制备Zr52.5Cu17.9Ni14.6Al10Ti5五元块体非晶合金楔形试样,研究活性元素Sc对合金玻璃形成能力及晶化动力学参数的影响。

The crystallization temperature of amorphous Gein Ge-Aurnonolayer films can be reduced by increasing the content of Au.The as-deposited Ge-5at%Au monolayer films are amorphous and can becrystallized at 150℃.

Ge-Au合金单层膜中Au含量的增加,可以使非晶Ge的晶化温度(纯非晶Ge晶化温度为400℃)降低,如Ge-5at%Au单层膜原态为非晶态,晶化温度为150℃。

Based on the Miedema formation heat model for binary alloy and the Toop asymmetric geometrical model,the excess free energy,formation heat,excess entropy and the interactive coefficients of activity among all components of Si-Ca-Ba ternary alloy melts were calculated thermodynamically at

根据Miedema二元合金生成热模型和Toop非对称几何模型,对1 873 K时Si-Ca-Ba三元合金熔体过剩自由能、生成热、过剩熵以及各组元间的活度交互作用系数等热力学性质进行了计算。

Based on the Miedema formation heat model for binary alloy and the Toop asymmetric geometrical model, the excess free energy, formation heat, excess entropy and the interactive coefficients of activity among all components of Si-Ca-Ba ternary alloy melts were calculated thermodynamically at 1873K.

根据Miedema二元合金生成热模型和Toop非对称几何模型,对1873K时Si-Ca-Ba三元合金熔体过剩自由能、生成热、过剩熵以及各组元间的活度交互作用系数等热力学性质进行了计算。

Main results are listed as below: 1. In rapid solidification, when the cooling rate is over some critical value, the solidification system will become unstable in the sense of the nonequilibrium thermodynamics, a uncontinuous steady state jump phenomenon will occur, and this uncontinuous steady state jump can be understood as the glass transition.

主要得到了如下结果:(1)通过对快速凝固过程的动力学及热力学的分析,提出了非晶转变的分枝理论模型,结果表明,对一合金熔体,当冷却速度大于某一临界值时,凝固体系会出现非平衡热力学意义上的失稳而出现多定态分枝现象,这一多定态现象可以被理解为非晶转变。

It is stressed introducing development and application of SPS in preparing functionally gradient material, thermoelectricity material, ferroelectric material, magnetism material, composite, noncrystal alloy, shape memory alloy, diamond and nanometer material etc.

重点介绍了SPS在制备功能梯度材料、热电材料、铁电材料、磁性材料、复合材料、非晶合金、形状记忆合金、金刚石和纳米材料等领域的应用情况和进展。

The disordered solid solution Al was obtained for Fe_(25)Al_(65)Ni_(10) mixture powder. The mechanical alloying of Fe_(0.25)Al_(0.75-x)Ni_x(x=0.05,0.175,0.25) mixture powders result in intermetallic compounds. The results of mechanical alloyed_(1-x)Ni_x (x=0.4,0.6) and (FeAl_3)_(1-x)Ni_x(x=0.1,0.3) mixture powders indicate that the ratio of iron and aluminum determines the formation of intermetallic compounds. The FeNi intermetallic compound, cerium oxide and one unidentified phase were obtained by mechanical alloying FeCeNi_3 and Ce_2 mixture powders.

对于合金化过程中的结构演变采用X射线衍射仪、DTA或DSC热分析仪、SEM进行分析,对Al-Fe-Ni和Ce-Fe-Ni两个三元系的机械合金化过程的研究表明:对于Al-Fe-Ni三元系来说,成分为Fe_(25)Al_(65)Ni_(10)的混合粉末经机械合金化后可生成非晶与纳米晶的混合物;球磨成分为Fe_(0.25)Al_(0.75-x)Ni_x(x=0.05,0.175,0.25)混合粉末,可形成Al_3Ni_2,AlFe_3,AlFe_(0.23)Ni_(0.77),球磨成分为_(1-x)Ni_x(x=0.4,0.6)和(FeAl_3)_(1-x)Ni_x(x=0.1,0.3)混合粉末,Fe与Al比例相同时球磨所形成的金属间化合物也相同。

The effects of nonstoichiometric ratio x on the structure, thermodynamic properties for the alloys MmBx (Mm=mischmetal, B=Ni0.72Mn0.08Co0.14Al0.06, x=4.2 - 5.5) and the charge-discharge performances of metal hydride electrodes were investigated.

本文研究了非化学计量比混合稀土-镍系贮氢合金MmBx的配比数x对合金结构、热力学性能和金属氢化物电极充放电性能的影响。

Locks EP 138 is suitable for cutting and grinding of ferrous and non-ferrous materials including copper and its alloys, aluminium and its alloys, stainless steel, nimonic alloys and ceramic materials.

应用范围广泛,洛斯 EP 138适合铁及非铁金属的切削及磨削作业,其中包括铜及其合金、铝及其合金、不锈钢、耐热合金以及陶瓷等。

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