纳米颗粒加入镀液可提高镀层的硬度,并可能影响镀层的耐蚀性能。用化学沉积法制备了纳米TiO2-Ni-P复合镀层。研究了pH值、温度对沉积速度的影响,及表面活性剂种类对镀层硬度的影响,并得出优化配方。镀态和不同温度热处理后的复合镀层的硬度都明显地高于Ni-P合金镀层。用化学法测得了镀层中的TiO2颗粒的含量为2.14%。镀层在400℃下热处理1h后,XRD分析发现镀层结构由非晶态转变为晶态,并出现了强化相Ni3P,其镀层硬度高达HV1100。在3.5%NaCl溶液中测定了合金镀层与纳米复合镀层的自腐蚀电位,发现二者的值相近,且都高于铁基体。

以固体与分子经验电子理论（EET）和改进的Thomas-Fermi-Dirac(TFD)理论为基础，以合金奥氏体、合金马氏体及其界面为例，给出了相结构因子nA, FDC,S和界面结合因子ρ，△ρ，σ的计算方法。计算了常用合金元素在0.2%C和1.0%C钢中的相结构因子和界面结合因子，用相结构因子和界面结合因子阐述了强韧性良好的20CrNi3钢和20Cr2Ni4钢的强韧化机制和耐磨性极高的ZGMn13耐磨钢的耐磨机制，并用相结构因子和界面结合因子预言了一种强韧性更高的Cr-Ni-W-V-0.2%C钢。结果与实际符合良好。

本文研究了SiCw/Al复合材料(碳化硅晶须增强铝复合材料) 的尺寸稳定性, 结果表明: 这种材料的微屈服强度、微蠕变抗力均明显高于其基体铝合金, 其热膨胀系数明显低于基体铝合金, 这种材料具有优异的尺稳定性。

The second phase in multi-phase alloys has connection with many important phenomena such as aging strengthening, dispersion strengthening, secondary hardening, crystal refinement. In this paper, the interface conjunction factors of the interface between MC(M=V, Nb, Ti) and austenite and martensite are calculate out. The relationship between these factors and the characteristics are analyzed. The reason for the second phases being fine and dispersing and their strengthening and toughening effect on the alloy is explained using the relationship. Based on the relationship, the valence electron structure of the interface between the second phase particles and the matrix can be optimized by changing the alloying elements, which make it possible to design the composition of alloys from the valence electron structure of the second phase particles.

Tempering is an important phenomenon in ferrous alloys. Most steels, especially alloying steels, are used after quenching and tempering. To design the composition of quenching and tempering steels, control the tempering process more effectively, improve the properties after tempering and realize the potentials of steels, the essence of tempering process and the properties of tempering products have to be understood. In this paper, the phase structure factors and interface conjunction factors of common alloying elements in cementite and its interface are calculated out. The relationships between these valence electron structure parameters and (i) the phenomena of martensite decomposition, (ii) transformation, gathering and growth of the carbides and (iii) the mechanical properties of tempering products are buitt up. The nature of the effect of alloying elements on tempering process and properties of tempering products is uncovered on the level of valence electron structure. One new theoretical foundation for alloy design is provided.