CAJ | 학술논문

通过微波烧结制备TiC/6061铝基复合材料，采用TEM、EDS、XRD分析该复合材料结合界面的结构、元素分布和相组成；从热力学角度研究新相的形成机理。结果表明：结合界面存在厚度约为100 nm的扩散型和反应型2种中间层，其与基体和增强相的邻接整洁、边界连续、结合紧密。扩散型界面，具有(111)Al//(240)TiC，[011] Al//[001]TiC的晶体学位向关系并形成半共格界面；反应型界面，由 TiAl 和微纳米级的 Al4W 相组成。界面TiAl相的热力学形成机理为Al和Ti元素通过扩散的方式首先生成TiAl3，之后随Ti元素的进一步扩散占据TiAl3中Al的位置，最终形成TiAl。
통과미파소결제비TiC/6061려기복합재료，채용TEM、EDS、XRD분석해복합재료결합계면적결구、원소분포화상조성；종열역학각도연구신상적형성궤리。결과표명：결합계면존재후도약위100 nm적확산형화반응형2충중간층，기여기체화증강상적린접정길、변계련속、결합긴밀。확산형계면，구유(111)Al//(240)TiC，[011] Al//[001]TiC적정체학위향관계병형성반공격계면；반응형계면，유 TiAl 화미납미급적 Al4W 상조성。계면TiAl상적열역학형성궤리위Al화Ti원소통과확산적방식수선생성TiAl3，지후수Ti원소적진일보확산점거TiAl3중Al적위치，최종형성TiAl。
TiC/6061 Al matrix composites were prepared by microwave sintering. The bonding interfaces and electron diffraction pattern of interfaces, chemical composition and phase composition were respectively analyzed by TEM, EDS and XRD;based on the thermodynamic data, formation mechanism of new phase was studied. The results show that, the bonding interfaces have two types of intermediate layers with thickness about 100 nm which are diffusion type and reaction type, the adjacent boundaries of the intermediate layer with substrate and reinforced phase are clean, continuous and tight coupling. The crystallographic orientation relationships of diffusion type interface are (111)Al//(240)TiC, Al[0 1 1] // TiC[001] and it forms a semi-coherent interface; reactive type interface is composed of TiAl phase and micro-nano Al4W. The thermodynamic mechanism of interface TiAl phase is that Al and Ti elements first form TiAl3 by diffusion;then Ti occupies the position of Al in TiAl3 with further spread of Ti element, at last TiAl is formed.