氮化物增强TiAl复合材料的制备及性能研究.pdfVIP

HotWorkingTechnology2022,Vol.51,No.20

复合材料

氮化物增强TiAI复合材料的制备及性能研究

陈煦芬，蒋丽君，赵逸鸥，王良辉

（西南交通大学材料科学与工程学院，四川成都611730)

摘要：氮化工艺应用于钛铝合金性能优化方面的趋势日益增长，为此类材料发展的重要方向之一。采用直接氮化

法与放电等离子烧结技术制备氮强化相增强Ti48A12Gr2Nb基复合材料，研究了NH，、N,两种气体直接氮化钛铝合金

粉末的效果，并对相应的氮化试样进行了显微硬度、耐磨性测试，运用扫描电镜（SEM）、X射线衍射物相分析（XRD）、X

射线能谱分析（EDS)对合成产物进行了表征。结果表明：提高氮化温度与保温时间有利于氮强化相的生成。在本次试验

中，通过综合考虑粉末氮化效果与试样的硬度、耐磨性情况，可以得出N更适合作为钛铝合金的氮化气氛。

关键词：氮化钛铝合金；直接氮化法；显微硬度；耐磨性

D0I:10.14158/ki.1001-3814

中图分类号：TB331;TG156.8+2文献标识码：A

StudyonPreparationandPropertiesofNitrideReinforcedTiAlComposites

CHENXufen,JIANGLijun,ZHAOYiou,WANGLianghui

(SchoolofMaterialsScienceandEngineering,SouthwestJiaotongUniversity,Chengdu611730,China)

Abstract:TheapplicationofnitridingtechnologyintheperformanceoptimizationofTi-Alalloyisincreasing,whichis

oneofthemostimportantdevelopmentdirectionsofthismaterial.NitrogenreinforcedphaseenhancedTi48AI2Gr2Nb

compositeswerepreparedbydirectnitrideanddischargeplasmasinteringtechnology.TheeffectofNH,N,twogasdirect

titaniumnitridepowderwasstudiedandthemicrohardnessandwearresistanceofcorrespondingnitridesamplesweretested,

andthemicrohardnessandwearresistancetestswereconductedonthecorrespondingnitridesamples.Thesyntheticproducts

werecharacterizedusingscanningelectronmirror(SEM),X-raydiffractionphaseanalysis(XRD),andX-rayenergy

spectroscopyanalysis(EDS).Theresultsshowthatimprovingtheincreasingnitridetemperatureandinsulationtimeare

conducivetothegenerationofnitrogenstrengtheningphase.Inthisexperiment,bycomprehensivelyconsideringthepowder

nitrideeffectandthehardnessandwearresistanceofthetestsample,itcanbeconcludedth