SiC纳米颗粒对自蔓延高温合成Al-Ti-C中间合金的影响
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摘要
以铝粉、钛粉、石墨粉和纳米碳化硅粉末为原料,采用自蔓延高温合成法制备了Al-Ti-C-SiC中间合金。借助X射线衍射、扫描电镜(SEM)和差热分析(DSC)研究了不同质量分数SiC纳米颗粒对Al-Ti-C自蔓延高温合成反应合成产物的组成成分和TiC组织形态的影响。结果表明:随着SiC质量分数的增加,体系中的TiC数量增加,Al_3Ti数量减少,反应生成的Si在铝中溶解生成Al-Si合金;SiC的加入使得TiC的粒度增大,晶粒球化。
Al-Ti-C-SiC master alloy was prepared by self propagating high-temperature sy-nthesis using aluminum powder,titanium powder,graphite powder and nano-SiC_Pas raw materials.X-ray diffraction(XRD),scanning electron microscopy(SEM)and differential thermal analysis(DSC)were used to study the effect of SiC nanoparticles with different mass fractions on the synthesis of Al-Ti-C self-propagating high-temperature synthesis and its effects on the microstructure of TiC.The results show that with the increase of SiC mass fraction,the number of TiC in the system increases,and the amount of Al_3Ti decreases.The Si produced by the reaction is dissolved in aluminum to form an Al-Si alloy.The addition of SiC increases the particle size of TiC and makes the grain spheroidization.
Al-Ti-C-SiC master alloy was prepared by self propagating high-temperature sy-nthesis using aluminum powder,titanium powder,graphite powder and nano-SiC_Pas raw materials.X-ray diffraction(XRD),scanning electron microscopy(SEM)and differential thermal analysis(DSC)were used to study the effect of SiC nanoparticles with different mass fractions on the synthesis of Al-Ti-C self-propagating high-temperature synthesis and its effects on the microstructure of TiC.The results show that with the increase of SiC mass fraction,the number of TiC in the system increases,and the amount of Al_3Ti decreases.The Si produced by the reaction is dissolved in aluminum to form an Al-Si alloy.The addition of SiC increases the particle size of TiC and makes the grain spheroidization.
引文
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[3]李玉新.Al-C-Ti系粉末材料激光点火自蔓延烧结及产物的研究[D].长春:吉林大学,2008.
[4] Brinkman H J, Zupanic F, Duszczyk J. Production of Al-Ti-C grain refiner alloys by reactive synthesis of elem-ental powders[J].Journal of Materials Research,2000,15(12):2620-2627.
[5]严有为,刘生发,范晓明,等.自蔓延高温合成Al-Ti-C晶粒细化剂及其晶粒细化效果[J].中国有色金属学报,2002(5):977-981.
[6] Yan Youwei, Fu Zhengyi, Yuan Runzhang. Grain refining performance of SHS Al-50TiC master alloys for commercially pure aluminum[J].Journal of Wuhan University of Technology Mater. Sci. Ed,2012,17(3):13-16.
[7] Cho Younghee, Lee Jungmoo, Kim Hwajung, et al. Feasible process for producing in situ al/tic composites by combustion reaction in an Al melt[J].Metals and Materials International,2013,19(5):1109-1116.
[8]李英龙.Al-Ti-C晶粒细化剂的制备及其微观组织与细化机理的研究[D].沈阳:东北大学,2004.
[9] Svynarenko, Kateryna, Zhang Yubo, et al. Microstructure and refinement performance of Al-Ti-C master alloy:Effect of excess Ti on the growth and nucleating ability of TiC particles[J].Metals and Materials International, 2017, 23(5):994-1001.