Biphase interface exists in both complex phase alloy and composite. Improvement ofthe interface between the matrix and the second phase has become an important task inmaterial research. In recent years, the models of ...Biphase interface exists in both complex phase alloy and composite. Improvement ofthe interface between the matrix and the second phase has become an important task inmaterial research. In recent years, the models of strong interface connection and weak in-terface connection and the strengthening mechanism of the matrix and the展开更多
THE calculation method of the average covalent electron density （CED） of crystal planes with relatively dense atom arrangement in austenite and martinsite in Fe-C alloy has been advanced in refs. [1, 2]. The electro...THE calculation method of the average covalent electron density （CED） of crystal planes with relatively dense atom arrangement in austenite and martinsite in Fe-C alloy has been advanced in refs. [1, 2]. The electron density of the biphase interface between （111） of austenite and （110） of martensite has also been discussed with that method. In this note, taking another important phase in Fe-C alloy, cementite （Fe<sub>3</sub>C） as research object, we advance a展开更多
The surface and interface of materials have always been a hot topic. Utilizing poten-tial energy function between atoms and considering factors, such as relaxation, computersimulations of grain boundary atom structure...The surface and interface of materials have always been a hot topic. Utilizing poten-tial energy function between atoms and considering factors, such as relaxation, computersimulations of grain boundary atom structure have been performed by many authorsthrough lowest-energy imitation. Wang Chongyu gave an excellent description of the展开更多
Based on YU’s solids and molecules emperical electron theory(EET), interface valence electron structure of TiC-Fe3Al composites was set up, and the valence electron density of different atomic states TiC and Fe3Al co...Based on YU’s solids and molecules emperical electron theory(EET), interface valence electron structure of TiC-Fe3Al composites was set up, and the valence electron density of different atomic states TiC and Fe3Al composites in various planes was determined. The results indicate that the electron density of (1 00)Fe3Al is consistent with that of (110)TiC in the first-class a pproximation, the absolute value of minimum electron density difference along the interface is 0.007 37 nm?2, and the relative value is 0.759%. (1 10)TiC //(100)Fe3Al preferred orientation is believed to benefit the formation of the cuboidal shape TiC. In the other hand, it shows that the particle growth is accompanied by the transport of electron, the deviation continuity of electron density intrinsically hinders the grain growth. The electron density of (100)TiC is not consistent with Fe3Al arbitrary crystallographic plane, thus it well explains that the increased titanium and carbon contents do not increase the size of large particles. The crystallographic orientation of (1 10)TiC //(100)Fe3Al will improve the mechanical properties. Therefore interface electron theory is an effective theoretical implement for designing excellent property of composites.展开更多
文摘Biphase interface exists in both complex phase alloy and composite. Improvement ofthe interface between the matrix and the second phase has become an important task inmaterial research. In recent years, the models of strong interface connection and weak in-terface connection and the strengthening mechanism of the matrix and the
文摘THE calculation method of the average covalent electron density （CED） of crystal planes with relatively dense atom arrangement in austenite and martinsite in Fe-C alloy has been advanced in refs. [1, 2]. The electron density of the biphase interface between （111） of austenite and （110） of martensite has also been discussed with that method. In this note, taking another important phase in Fe-C alloy, cementite （Fe<sub>3</sub>C） as research object, we advance a
文摘The surface and interface of materials have always been a hot topic. Utilizing poten-tial energy function between atoms and considering factors, such as relaxation, computersimulations of grain boundary atom structure have been performed by many authorsthrough lowest-energy imitation. Wang Chongyu gave an excellent description of the
基金Project(Q99F01) supported by the Natural Science Foundation of Shandong Province, China
文摘Based on YU’s solids and molecules emperical electron theory(EET), interface valence electron structure of TiC-Fe3Al composites was set up, and the valence electron density of different atomic states TiC and Fe3Al composites in various planes was determined. The results indicate that the electron density of (1 00)Fe3Al is consistent with that of (110)TiC in the first-class a pproximation, the absolute value of minimum electron density difference along the interface is 0.007 37 nm?2, and the relative value is 0.759%. (1 10)TiC //(100)Fe3Al preferred orientation is believed to benefit the formation of the cuboidal shape TiC. In the other hand, it shows that the particle growth is accompanied by the transport of electron, the deviation continuity of electron density intrinsically hinders the grain growth. The electron density of (100)TiC is not consistent with Fe3Al arbitrary crystallographic plane, thus it well explains that the increased titanium and carbon contents do not increase the size of large particles. The crystallographic orientation of (1 10)TiC //(100)Fe3Al will improve the mechanical properties. Therefore interface electron theory is an effective theoretical implement for designing excellent property of composites.
