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On the Thermodynamic Aspect of Interaction Between Dislocations and Highly Mobile Interstitial Solute: With Special Focus on Recent Progress in Pd-H System: A Review

Sheng Li , Yu-Zeng Chen , Yu-Ke Cao , Feng Liu

金属学报(英文版) doi:10.1007/s40195-016-0367-4

It is well known that, in kinetics, the interaction between dislocations and interstitial solute normally exerts strong solute drag effect on dislocations, leading to strong solution hardening of the metals. However, due to the low mobility of interstitial solute in many metals, thermodynamic aspect...

关键词: Plastic , deformation , Dislocation , Interstitial , solute , Strengthening , mechanism , Thermodynamics

Physical Simulation of Thermally Induced Martensite Formation from Retained Austenite in TRIP Steels

Lie ZHAO , Fred J. VERMOLEN , Jilt SIETSMA , Sybr , van der ZWAAG

材料科学技术(英文)

The present work analyses the total free energy of the material during the martensitic transformation. A general expression for the martensite fraction as a function of temperature is derived, assuming that the nonchemical free energy is proportional to the volume of martensite. This expression indi...

关键词: Thermodynamics , null , null , null

Influence of Phase Constitution on Mechanical Performance of 12Ce-3Y-ZrO2/2.5 wt pct Al2O3 Composites

Shuigen HUANG , Lin LI , J.Vleugels , O.V.D.Biest

材料科学技术(英文)

The phase constitution of a composite consisting of 12 at. pct CeO2-3 at. Pct Y2O3-ZrO2/2.5 wt pct Al2O3 (3Y12Ce2.5Al) was determined by thermodynamic calculation. It is a combination of 36.9 at. pct cubic phase and 63.1 at. pct tetragonal phase at 1450℃. Green compacts were fabricated by cold isost...

关键词: Thermodynamics , null , null

阴离子掺杂TiO2的芯位移和热力学性质的第一性原理研究

丁戊辰 , 李微雪

催化学报 doi:10.1016/S1872-2067(14)60165-0

采用第一性原理计算考察了阴离子(硼、碳、氮、氟、磷、硫)掺杂的二氧化钛(包括锐钛矿相和金红石相)。芯位移计算结果表明,在氮掺杂的TiO2中,间隙掺杂类型的N的1s能级在XPS能谱上峰的位置要比替代掺杂的能级高,类似的结果也在硼、碳、磷和硫掺杂的TiO2上发现。然而对于F掺杂的TiO2,替代掺杂的峰位...

关键词: 二氧化钛 , 芯位移 , X射线光电子能谱 , 阴离子 , 替换掺杂 , 间隙掺杂 , 密度泛函理论 , 热力学性质

Thermodynamic analysis of the simple microstructure of  AlCrFeNiCu high-entropy alloy with multi-principal elements

Anmin LI , Xiyan ZHANG

金属学报(英文版) doi:10.1016/S1006-7191(08)60092-7

AlCrFeNiCu high-entropy alloy (THA) was synthesized by the arc melting and casting method. The alloy exhibits simple FCC and BCC solid solution phases rather than intermetallic compounds. The reason is that the Gibbs free energy of mixing of the equimolar AlCrFeNiCu alloy is smaller than that of int...

关键词: Multi-principal elements alloy , null , null , null

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound during Mechanical Alloying

S.N. Hosseini

材料科学技术(英文)

The nanostructured CoAl intermetallic compound was produced by mechanical alloying (MA) of the Co50Al50 elemental powder mixture in a planetary high energy ball mill. The ordered B2-CoAl structure with the grain size of about 6 nm was formed via a gradual reaction after 10 h of...

关键词: Intermetallics

A New hcp Phase Formed in the Ni-Nb System during Ion-beam-assisted Deposition

Bin ZHAO , Kuiwei GENG , Fei ZENG , Feng PAN

材料科学技术(英文)

The Ni80Nb20 films were prepared by ion beam assisted deposition (IBAD) with various Ar+ ion energies. A phase evolution of fcc→amorphous→Ni+Nb→Ni+hcp was observed with the increasing of ion beam energy from 2 keV to 8 keV. When bombarded by Ar+ ions of 8 keV during deposition, a new crystalline pha...

关键词: Hcp phase , null , null , null , null

Phase stability of Ta-W alloys

Xiaobo LI

金属学报(英文版)

The characteristic crystal model is applied to the study of phase stability and thermodynamics in substitutional bcc-based Ta-W alloys. The basic principle and method of alloy thermodynamics which is described by the characteristic crystal model is introduced in detail. The Gibbs energy of various p...

关键词: Ta-W alloys , phase diagram , characteristic crystal model , thermodynamics , phase stability

A Study of the Ni-Cr-Zr System at 900°C

Ximiao PAN , Zhanpeng JIN

材料科学技术(英文)

The phase equilibrium relations of the ternary Ni-Cr-Zr system at 900°C have been investigated by means of diffusion triple and electron probe microanalysis (EMPA) techniques. A series of tie lines and triangles have been determined, and the corresponding tentative isothermal section is presented ba...

关键词: Nickel , null , null , null

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound during Mechanical Alloying

S.N. Hosseini

材料科学技术(英文)

The nanostructured CoAl intermetallic compound was produced by mechanical alloying (MA) of the Co50Al50 elemental powder mixture in a planetary high energy ball mill. The ordered B2-CoAl structure with the grain size of about 6 nm was formed via a gradual reaction after 10 h of...

关键词: Intermetallics

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