銅、珪素、アルミニウム合金の平衡状態圖 : 第一編、各二元系合金の状態圖
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概要
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For the first report of this ternary equilibrium diagram, the investigation of binary Cu-Al diagram was carried out by means of differential thermal analyses, electric resistance method, microscopic examination ; and a new equilibrium diagram has been ascertained. The liquidus of this system consists of 8 branches corresponding to the separation of α, β, γ_1, ε_1, ε_2, η_1, θ, and κ. The γ_2 phase is formed by the following reactions according to the concentration of alloys : γ_1⇄γ_2 γ_1+ε_1⇄γ_2 The former reaction takes place at 780°-873℃ in the range of 84.5-82 per cent. copper as it has been observed by Stockdale. The latter is found by the present writer to occur at 873℃ in the range of 82-79 per cent. copper. The existence of newly found δ and ζ phases is ascertained ; the δ being formed by the peritectoid reaction γ_2+ε_2⇄δ at 686℃ ; and the ζ by the peritectoid reaction ε_2+η_1⇄ζ_1 at 590℃. These phases form some range of solid solution, whose solubility decreases as temperature falls. The eutectoid reactions ε_2⇄γ_2+ζ_1 and ζ_1⇄δ+ζ_2 take place at 560℃ and 530℃ respectively. Each of the ε and η phases shows a polymorphic transformation. Among them the polymorphic change of η phase is evident, but that of the ε phase is somewhat indistinct. The θ phase crystallizes directly from the melts, and forms a narrow range of solid solution. Brief considerations on the binary diagrams of aluminium-silicon and copper-silicon were also given.
- 社団法人日本鉄鋼協会の論文
- 1935-09-25
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関連論文
- 銅珪素アルミニウム合金の平衡状態圖(II)
- 銅、珪素、アルミニウム合金の平衡状態圖 : 第一編、各二元系合金の状態圖
- 12) 銅、アルミニウム、珪素三元系合金の平衡状態圖に就て(日本鐵鋼協會第拾參囘講演大會(滿洲冶金學會聯合))