(哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 哈爾濱 150001)
摘 要: 近年來對共晶合金共生(耦合)生長形態(tài)穩(wěn)定性的研究取得了一系列重要的成果。 這些成果主要包括： 片層共晶共生生長在最小過冷度下的超穩(wěn)定性、 片層共晶共生生長的Z字形分叉、 熔體流動及非線性動力學(xué)對共生生長形態(tài)穩(wěn)定性的影響等。 在此基礎(chǔ)上人們又開始關(guān)注包晶合金定向凝固中的穩(wěn)態(tài)共生生長及其形態(tài)穩(wěn)定性。 綜述了這些研究成果， 并對其發(fā)展方向進(jìn)行了探討。
關(guān)鍵字: 共晶合金； 包晶合金； 共生生長； 形態(tài)穩(wěn)定性
（School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract: The achievements of recent extensive experimental and theoretical researches on the morphological instabilities of eutectic and peritectic coupled growth were reviewed. The predominant findings are: the overstability below the minimum undercooling spacing of eutectic coupled growth, zigzag bifurcation in bulk lamellar eutectic coupled growth, influences of fluxion in melts and nonlinear dynamics upon the morphological instabilities of coupled growth, and morphological stability of isothermal and non-isothermal peritectic coupled growth, and the similarities and differences between peritectic and eutectic coupled growth. The prospective directions of morphological stability of coupled growth were discussed.
Key words: eutectic alloy; peritectic alloy; coupled growth; morphological stability
