The research of diamond film growth with a process of hot filament chemical vapourdeposition(HF·CVD)has been carried out for several years,and one of the main technicalproblems hindering the development of this
Using X-ray precession method,it is found that the distribution of reciprocal lattice ofβ-W structure is lust the distortion of the reciprocal space of A16Li3Cu quasicrystal structure.Except the distortion,the X-ray ...Using X-ray precession method,it is found that the distribution of reciprocal lattice ofβ-W structure is lust the distortion of the reciprocal space of A16Li3Cu quasicrystal structure.Except the distortion,the X-ray diffraction patterns along 5-fold,3-fold and 2-fold axes can be observed.Their angular relations satisfy well with those of the perfect icosahedral symmetry;and all the diffraction spots can be indexed approxmately to be six-dimension and strictly in three-dimension.展开更多
In this letter we report of A165Fe15Cu20 alloy by means of electron and X-ray diffractometry.A new crystalline phase of body-center-cubic structure with a lattice parameter a°=1.407nm was observed together with t...In this letter we report of A165Fe15Cu20 alloy by means of electron and X-ray diffractometry.A new crystalline phase of body-center-cubic structure with a lattice parameter a°=1.407nm was observed together with the icosahedral phase in the same sample.The new phase is supposed to be an isomorph of Mg32(A1,Zn)49(R phase)on the basis of structure factor calculation.展开更多
文摘The research of diamond film growth with a process of hot filament chemical vapourdeposition(HF·CVD)has been carried out for several years,and one of the main technicalproblems hindering the development of this
文摘Using X-ray precession method,it is found that the distribution of reciprocal lattice ofβ-W structure is lust the distortion of the reciprocal space of A16Li3Cu quasicrystal structure.Except the distortion,the X-ray diffraction patterns along 5-fold,3-fold and 2-fold axes can be observed.Their angular relations satisfy well with those of the perfect icosahedral symmetry;and all the diffraction spots can be indexed approxmately to be six-dimension and strictly in three-dimension.
基金Project supported by the National Science Foundation of China.
文摘In this letter we report of A165Fe15Cu20 alloy by means of electron and X-ray diffractometry.A new crystalline phase of body-center-cubic structure with a lattice parameter a°=1.407nm was observed together with the icosahedral phase in the same sample.The new phase is supposed to be an isomorph of Mg32(A1,Zn)49(R phase)on the basis of structure factor calculation.
