Shuzhi Liao

Theoretical calculation of the mixing enthalpies of 21 IIIB-IVB, IIIB-VB and IVB-VB binary alloy systems

The calculation of the formation/mixing enthalpies of binary alloys is an important problem. There have been no systematic theoretical calculations of the mixing enthalpies for group B alloy systems using the famous Miedema theory or from the theoretical methods of first principle. Therefore such calculations for the 21 binary group IIIB-IVB, IIIB-VB and IVB-VB metal alloy systems are performed systematically for the first time using a subregular model. The results show that the agreement between the calculations and experimental data is pretty good and could be accepted from the theoretical or experimental points of view. From the present results and those in other two papers by the authors, it also can be concluded that the subregular model can be used for calculating the mixing enthalpies for all the 36 alloy systems combined with the 9 group B metals of Zn, Cd, Ga, In, Tl, Sn, Pb, Sb and Bi.

A subregular model for calculating the mixing enthalpies in 10 binary IIB-IIIB alloy systems

Up to now there existed no theoretical calculations of the mixing enthalpies for the group-B alloy systems using the famous Miedemas theory or by the theoretical methods of the first principle. Therefore such calculations for the 10 group–IIB-IIIB binary alloy systems are performed for the first time by a subregular model. The results show that the agreement between the experimental data and calculations is pretty good and could be accepted both from the theoretical viewpoint and from the experimental one. It also can be concluded from the results that the subregular model could be used for calculating the mixing enthalpies for the group-B alloys, at least for the IIB-IIIB alloy systems. The positive mixing enthalpies for all of the 10 alloy systems are discussed.

Progress of electroless amorphous and nano alloy deposition: a review - Part 2

Abstract The second part of this review of developments over the life span of electroless plating continues with the period of rapid development (1980–99), describing the upsurge of large scale application, research into ternary and multi-component alloys and composites, the rapid development in China – now the world’s biggest consumer of electroless Ni – and the development of electroless deposition of Fe–B based alloys. Since the new millennium began many fundamental mechanistic studies have been conducted and the development of nano-electroless plating has occurred.

Size Model of Critical Temperature for Grain Growth in Nano V and Au

The intrinsic thermodynamical factors that dominate the stability of nanocrystallines are investigated through the microcosmic process of grain growth. The results suggest that nanocrystallines grows at a certain temperature and the critical temperature is determined by the vacancy formation energy and diffusion activation energy of the nanocrystallines. Based on the hypothesis, a simple model is proposed to predict the size-dependent critical temperature of grain growth. Within this model, we investigate the thermal stability of nanocrystallines V and Au, compared with the results available. It is shown that the critical temperature decreases with decreasing size, showing an evident size effect. The research reveals that the thermal stability is dependent on the energetic state of the nanocrystallines and the mobility of the inner atoms.