(中南大學(xué) 材料科學(xué)與工程系，長沙 410083)
摘 要: 根據(jù)相區(qū)鄰接規(guī)則和擴散偶中的相區(qū)分布的關(guān)系，運用三元擴散偶方法確定三元系中的四相轉(zhuǎn)變從而導(dǎo)出三元系中相轉(zhuǎn)變與擴散偶中相區(qū)分布的關(guān)系；利用Nb-Ti-Si三元系的實驗，驗證了包共析型轉(zhuǎn)變前后等溫截面與擴散偶中相區(qū)分布的關(guān)系。
關(guān)鍵字: 等溫截面；相區(qū)分布；四相平衡
in diffusion triple and quaternary
phase equilibria
（Department of Materials Science and Engineering，
Central South University，Changsha 410083，China）
Abstract:According to the principle of adjoining phase fields and the distribution of phase fields in diffusion couples，relation between phase transformation in ternary system and the phase fields distribution in diffusion couples is derived；the experiment of Nb-Ti-Si proves the relation between the change of isothermal sections of peritectoid-eutectoid reaction and the phase fields distribution in Nb-Ti-Si diffusion couples.
Key words: isothermal section；distribution of phase fields；quaternary phase equilibria
