鉄鋼スラグ及びその主成分に対するSi_3N_4焼結体の耐腐食性に及ぼす雰囲気の影響

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rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002289042/Corrosion of Si_3N_4 sintered bodies against blast furnace slags, converter slags and main components of these slags such as CaO, FeO and MnO_2 has been studied at 1200°-1400℃ for 1-12 h in air, Ar, N2 and O_2-N_2 atmospheres. For Si_3N_4 sintered bodies containing small amounts of Y_2O_3 and Al_2O_3 additives, the corrosion rate increased with increasing pores and glass phase in; sintered bodies. The corrosion behavior of Si_3N_4 sintered bodies against the various salts in Ar, N_2 and O_2-N_2 atmospheres, except for FeO salt, was very stable. In case of less corrosive salts such as blast furnace slag and CaO, the corrosion rate of Si_3N_4 sintered bodies in O_2-N_2 atmospheres increased with increasing O_2 partial pressure up to the air composition, the corrosion rate decreased extremely then above the air composition. In the corrosion of the Si_3N_4 sintered bodies against the various salts, the oxidation of Si3N4 seems to have occurred, and the corrosion proceeded continually by the reaction of SiO_2 with the salts
社団法人日本セラミックス協会の論文
1990-04-01