摘要
采用常规铸造法制备了Al_(64)Cu_(24)Fe_(12)准晶,研究了不同冷却速度对准晶的组织和相变化的影响。结果表明:铸态时,试样中的主要组成相基本相同为λ((Al-Cu)_(13)Fe_4)、I(Al_(64)Cu_(24)Fe_(12))、β(τ)(Al(Fe,Cu))、η(AlCu)相。其中冷却速度越大准晶合金的微观组织晶粒越细小,对先析出相λ相的抑制越明显。经过820℃保温6 h热处理后所有试样中都得到成分趋于单一的I相。而与其他试样相比,冷却速度最快的试样表面组织形貌更加平整,I相更加均匀单一化。
Al64Cu24Fe12 quasicrystalline material was prepared by conventional casting method.The effects of different cooling rates on the microstructure and phase transformation of the alloy were studied.The results show that the as-cast Al64Cu24Fe12 quasicrystalline material is composed of quasicrystalline I,λ-（ Al-Cu）13Fe4,β-（ Al（ Fe,Cu）） and η-（ AlCu） phases.The finer grains are obtained in the as-cast structure by faster cooling rate.Meanwhile,the growth of λ phase is restrained in samples under the faster cooling rate.However,after heat treatment at 820 ℃ for 6 h,almost single I phase can be obtained in all the samples.Compared with the samples under lower cooling rates,the more smooth surface and pure single I phase are observed for the sample under the fastest cooling rate.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第10期8-13,共6页
Transactions of Materials and Heat Treatment
基金
国家科技部国际科技合作项目(2014DFA50320)
国家自然科学基金(51574207
51574206
51204147
51274175)
山西省国际科技合作项目(2013081017
2012081013)
