Al-Fe-P三元系的热力学优化.pdf

《Al-Fe-P三元系的热力学优化.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、物理化学学报(WuliHuaxueXuebao2148ActaPhys．一Chim．Sin．2013，29(10)，2148—2156October【Article1doi：10．3866／PKU．WHXB201307291www．whxb．pku．edu．cllAI·Fe-P三元系的热力学优化曹战民谢伟’王昆鹏牛春菊杜广巍’乔芝郁’(北京科技大学钢铁冶金新技术国家重点实验室，冶金与生态工程学院，北京100083；北京科技大学材料科学与工程学院，北京100083)摘要：采用CALPHAD方法对A1．Fe-P三元系进行了热力学

2、评估，并根据相关的实验数据对边际二元系AI．P进行了热力学再优化，AI—Fe和Fe-P边际二元系的热力学参数取自之前的研究并做了局部调整．根据相图数据和热力学数据优化了AI-Fe—P三元系的热力学模型参数，获得了体系中所有相的Gibbs自由能表达式．所得参数之间自洽且能很好地重现AI—Fe—P体系的大部分实验相图信息．通过驱动力判据和本文优化所得的模型参数，从热力学上解释了该体系非晶形成能力与组成之问的关系．关键词：AI—Fe—P：相图：热力学：评估：非晶形成能力中图分类号：0642ThermodynamicOptimiza

3、tionoftheAI-Fe·PTernarySystemCAOZhan-Min’，XIEWei’WANGKun-Peng’NIUChun—JuDUGuang—Wei’QIAOZhi—Yu’(‘StateKeyLaboratoryofAdvancedMetallurgy,SchoolofMetallurgicalandEcologicalEngineering,UniversityofScience＆TechnologyBeo'ing,Beijing100083．PR．China；2SchoolofMaterialsScie

4、nceandEngineeringUniversityofScience＆TechnologyBeijing,Beo'ing100083．PR．China)Abstract：AcriticalthermodynamicoptimizationoftheAI-Fe-PternarysystemwasperformedusingtheCALPHADmethod．Amongthesub．binarysystemsintheAI．Fe．Psystem．theAI．Psystemwasreassessedaccordingtoitsr

5、elatedexperimentalinformation．ThethermodynamicdescriptionsoftheAI—FeandFe-Pbinarysystemsweretakenfr0mpreviousstudieswithminormodifications．TheparametersofthethermodynamicmodeloftheAI-Fe—PternarysystemwereoptimizedbasedonavailableexperimentaIphasediagramdataandtherm

6、odynamicproperties．OResetofconsistentparametersoftheGibbsenergiesofalIphases，whichcansatisfactorilyreproducemostoftheexperimentalphasediagramdata，wasobtained．Byemployingthedrivingforcec~edonwiththepresentthermodynamicdescnption。theexpedmentallyreportedcompositionde

7、pendenceoftheglass-formingabilityoftheAI-Fe—Psystemcouldbeexplainedthermodynamically．KeyWords：AI—Fe—P：Phasediagram；Thermodynamics；Optimization；Glassformingability1lntroductionattentionduetothatamorphousphaseformationhasbeenfoundPhosphorushasknowntobeanessentialmeta

8、lloidelementinintheA1一Fe—Psystembyusingamelt—spinningtechnique．Theforminganamorphousphaseexhibitingusefulengineeringevaluationoftheglass-forminga