溶液含浸法によるFe_5Si_3粒子分散Si_3N_4の作製と摺動及び機械的特性の評価

概要

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Silicon nitride calcined body with open pores was infiltrated with an iron-alcoxide solution. and sintered in nitrogen gas at high temperature to obtain a dense silicon nitride based material. Transmission Electron Microscope (TEM). Energy Dispersive X-ray Spectroscopy (EDS), and X-ray diffraction (XRD) analyses revealed that comparatively roundish Fe_5Si_3 particles with less than 2μm in size formed within the silicon nitride matrix. Under boundary and mixed lubricating conditions, the fractional coefficient of the obtained material was remarkably lower than that of normal silicon nitride, and equivalent to silicon nitride with dispersed Fe_5Si_3 particles fabricated by a conventional process. Moreover, the obtained ceramics showed a high flexure strength of 1187 MPa due to the very small size of the Fe_5Si_3 particles despite the existence of Fe-Si compounds in the surface layer.
社団法人日本セラミックス協会の論文
2003-03-01