【摘 要】
：
A large undercooling (250 K) was achieved in eutectic Ni78.6Si21.4 melt by the combination of molten-glass denucleation and cyclic superheating. The metastable
【机 构】
：
State Key Laboratory of Solidification Processing,Department of Applied Physics
论文部分内容阅读
A large undercooling (250 K) was achieved in eutectic Ni78.6Si21.4 melt by the combination of molten-glass denucleation and cyclic superheating. The metastable phase formation process in the bulk undercooled eutectic Ni78. 6Si21.4 melts was investigated. With the increase of undercooling, different metastable phases form in eutectic Ni78.6Si21.4 melts and part of these metastable phases can be kept at room temperature through slow post-solidification. Under large undercooling, the metastable phasesβ2-Ni3Si, Ni31Si12 and Ni3Si2 were identified. Especially, the Ni3Si2 phase was obtained in eutectic Ni78.6Si21.4 alloy for the first time. Based on the principle of free energy minimum and transient nucleation theory, the solidification behavior of melts was analyzed with regard to the metastable phase formation when the melts were in highly undercooled state.
其他文献
The title compound [ Ni(DMF)6]3[PMo12O40] 2 ( DMF = N, N’-dimethyllformamide ) was synthesized and structurally characterized by elemental analysis, IR, UV and
Multifractal spectrum, autocorrelation/semivariogram and power spectrum are three dif- ferent functions characterizing a field or measure from different aspects
BaMgAl10O17 :Mn2+ green phosphor was prepared by high temperature solid state reaction and the optimal chemical formula is Ba0.85 MgMn0.15 Al11.993 B0.007O19. T
Discuss the no-arbitrage principle in a fuzzy market and present a model for pricing an option. Get a fuzzy price for the contingent claim in a market involving
A new on-line batch process monitoring and diagnosing approach based on Fisher discriminant analysis (FDA) was proposed. This method does not need to predict th
The conversion of methanol to olefins (MTO) over the SAPO-34 catalyst in fixed-bed microreactor was studied. The effect of reaction temperatures for methanol co
In this paper a family, called the pivotal family, of distributions is considered.A pivotal family is determined by a generalized pivotal model. Analytical resu
利用描述ρ-π耦合的有效模型,研究了热密π介子环境中的ρ介子谱函数.数值计算的结果表明,随着温度和π介子化学势的升高,谱函数变宽,且峰的位置向高不变质量区移动.
We experimentally investigate the reflection behaviors of negative permeability metamaterials (NPMs) consisting of a periodic array of copper hexagonal split ri
This article is devoted to seek the solutions of the variable coefficient Ginzburg-Landau (vcGL) equation. With the help of symbolic computation and a direct an