Fe3Al金属间化合物网络结构增强Al基复合材料研究

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1、济南大学硕士学位论文Fe<,3>Al金属间化合物网络结构增强Al基复合材料研究姓名：徐福松申请学位级别：硕士专业：材料加工工程指导教师：耿浩然20090420Fe，Al会属问化合物网络结构增强Al幕复合材料研究预制体界面结合良好。对Fe3AI／AI复合材料试样进行了组织及力学性能分析。研究了材料界面区的微观结构及拓扑形貌，界面相组成，界面区合金元素的分布。网络结构增强体的体积分数明显影响弯曲强度和断裂韧性，当增强相体积分数为9％时，复合材料的最大高的弯曲强度达至U258Mpa，断裂韧性为12．6MPam忱。当增强体体积分数大于9％时，随着增强体体

2、积分数的增加，复合材料的弯曲强度和断裂韧性急剧下降。另外，研究了复合材料摩擦磨损行为，建立了网络结构增强复合材料的摩擦磨损模型。指出该模型不同于Khruschov模型和Zum．Gahr模型，其关系不遵循线性规则。该模型与复合材料的磨损试验数据相拟合，能够较好地反映网络结构增强复合材料的磨损性能。关键词：Fe3Al金属间化合物；网络结构；有机泡沫浸渍烧结工艺；负压浸渗工艺；摩擦磨损VI济南大学硕士学位论文ABSTRACTW油therapiddevelopmentofautomobileandnavigationindustry，thereisani

3、ncreasinglyhi曲standardforaluminiurnmatrixcomposites．Thewaytoreinforcealuminiummatrixcompositesismainlyparticalreinforcement，whiskerreinforcement,longfiberreinforcement，etc．Inordertoovercomethedefectsofthetraditionalmaterials，weconsultedandanalyzedbotlldomesticandoverseascorre

4、lativeliterature．DuetoFe3AIstructure，ithasmanyadvantage，suchashightemperatureresitance，anti-oxidationandcorrosionresistance．Moreover,Fe3AIisproducedatlowercostandhavemuchlowerdensityandbetterthermalconductivity．Therefore，wechooseFe3AInetworktoreinforcealuminiummatrixcomposite

5、sfirstlyandthecompositehasbeenmadesuccessfully．Thispaperfocusonthefollowingaspects：Atfirst，Fe3A1werepreparedbycombinedprocessbymechanicalalloyingandannealing．Itsformationprocessandmechanismwerestudied．ThestructuralevolutionofFe3AIformationprocess，andtheshapeofFe3A1particlehav

6、ebeeninvestigatedandtestedbymeansofXRD，SEM，etc．Dependingonmillingmechanicalalloyingtechnology,withtheincreaseinmillingtime，AIatomcouldbedissolvedintocrystallatticeofFe，andformdisordereda-Fe(A1)solidsolution．Duringannealingprocess，throughA1atomorderrearrangementandremovingofdo

7、mains，disorderedQ-Fe(A1)solidsolutionhasbeenchangedfromthelowerB2orderedtohigherD03orderstructure．Next，Fe3A1intermetallicsnetworkWasfabricatedbyprecursorablationtechnology．Relevantstudieswereconducedonthetopologicalstructure，mechanicalpropertyandtheeffectofdifferentsinterings

8、ystem．Underthetheoryofthecrackbridgemechanismandbluntcrackgrowthmech