加工した高純度 Fe-Al-N 合金中の AlN の析出

概要

論文の詳細を見る
The precipitation process of AlN in a cold worked high purity Fe-0.09Al-0.01N alloy was studied. The alloy was made from a zone refined high purity iron bar (>99.99%) and an Al-Fe alloy by embedding the latter at an interval along the specimen axis and zone refining the composite in a N_2-H_2 atmosphere. The alloy was subsequently quenched into ice water after solution treatment of 1250℃×1 hr and cold drawn 68.6% at room temperature. The electrical resistivities of the wires, annealed isochronally and isothermally, were measured in liquid nitrogen, and the precipitates of AlN were examined by electron microscope extraction replica method. The results obtained were as follows ; 1) A large decrease of the electrical resistivity was observed at the temperature range from 450℃ to 620℃, which was attributed to the precipitation of AlN. This temperature range was lower by about 100℃ than that in the not-strained specimens. 2) The precipitation processes under about 580℃ could be described as a first order reaction after a respective certain period of time, for which the activation energy of reaction was 58 Kcal/mol, which suggested that the precipitation of AlN in the cold worked matrix was controlled by the diffusion of Al in α-iron. 3) The cubic lattice structure of AlN was occasionally observed in the early stage of precipitation, but most of the precipitates observed in the high purity specimens used here were identified to be AlN of the hexagonal lattice structure.
社団法人日本鉄鋼協会の論文
1972-06-01

加工した高純度 Fe-Al-N 合金中の AlN の析出

スポンサーリンク

概要

著者

関連論文

スポンサーリンク