CAJ | 학술논문

采用搅拌铸造法制备了化学包覆Ni-CCNTs/Mg复合材料.测试了铸态条件下复合材料的高温力学性能,并对微观组织进行了观测和分析.试验结果表明,Al的加入能显著提高复合材料的高温性能.当Al含量为8%时,复合材料高温抗拉强度达到最大值152.3 MPa,相对于原始试样(未加Al的试样,抗拉强度为57.7 MPa)提高了164.2%;随着Al含量增加,金属间化合物Mg17Al12相的数量增多,并变得更加连续,与此同时晶粒明显变细.
채용교반주조법제비료화학포복Ni-CCNTs/Mg복합재료.측시료주태조건하복합재료적고온역학성능,병대미관조직진행료관측화분석.시험결과표명,Al적가입능현저제고복합재료적고온성능.당Al함량위8%시,복합재료고온항랍강도체도최대치152.3 MPa,상대우원시시양(미가Al적시양,항랍강도위57.7 MPa)제고료164.2%;수착Al함량증가,금속간화합물Mg17Al12상적수량증다,병변득경가련속,여차동시정립명현변세.
Ni-coated carbon nano-tubes (Ni-CCNTs)/ Mg-AI-Zn composites were fabricated by stirring cast-ing method. High temperature mechanical properties of the composites were tested and microstructure was observed by means of OM (optical microscope). The results show that with AI addition, the high tempera-ture mechanical properties of the composites can be significantly improved. With 8% AI addition, high temperature tensile strength of the composites reaches maximum value of 152MPa, compared with that of matrix samples, increased by 166. 7%. In addition, with increasing in AI addition, intermetallic compound Mg17AI12 phase is increased with more continuous dis-tribution, resulting in the great refinement of grain size.