Dynamic process simulation of solute grain boundary segregation;

Methodological probe into grain boundary etching of molybdenum disilicide based materials;

The chemical composition at the crystal boundary of transparent ceramics was observed and the concentration distribution of rare earth oxide in stable state was measured by electron microprobe analysis.

Al_2O_3distributed along crystal boundary,silicate impurities,separated carbon compound and σ phase together brought about crystal boundary weakening and resulted in high sensitivity for interdendritic corrosion.

The application of electroscope and pulse polishing technology enables the field ion microscope atomprobe (FIM AP) on the sample to locate itself successfully the crystal boundary, moreover, makes the dialing subatomprobe in the range to be efficiently analyzed.

Study on the grain-boundary strengthening model of polycrystalline materials;

Based on the existing grain-boundary segregation thermodynamics and kinetics, and according to thermodynamics second law, Fick's diffusion laws, and local equilibrium theory, a model is developed to calculate the solute grain- boundary segregation kinetics.

Some of recent progress were summarized, including the preparation of nanosized powder, highly strengthened ceramic with submicrometer grain structure obtained via spark-plasma sintering method, improved conductivity of grain-boundary via precursor scavenging of two-stage sintering, and a pseudoternary stabilized 5%In2O3-8%Y2O3-ZrO2(all percentages in formula are mole percentage) system.

The effect of grain boundaries on magnetic and transport properties in colossal magnetoresistance particle film;

Segregation and interaction of rare earth and iron elements on grain boundaries in ZA27 alloys;

In order to reveal the behaviors of Fe and RE atoms on grain boundaries in ZA27 alloy theoretically, the atomic structure model of high angle grain boundary of α phase in ZA27 alloy was set up by using the concept of coincidence-site lattice(CSL).