机能上地分级的材料(FGM ) 的准备(TiB2 ) 有 Ni3Al 和由激活地的帮助压力的合成过程(FAPAS ) 的镍的底层的金属间化合的复合媒介层的 pNi 被调查。Ni3Al 由于它在它的合成期间免除镍和铝粉末的热的大买卖第一次被选择为 FGM 的层。微观结构,层的阶段作文,越过接口的微坚硬、元素的集中侧面被描绘。重要在层之间的元素内部散开显示出好契约的形成。样品的测量微坚硬的价值从镍底层在 2 公里的距离上 monotonically 增加了到超过 3 500 HK 到表面层(TiB2 ) pNi。这调查的结果与好散开契约为 FGM 的快速的形成表明 FAPAS 过程的可行性。
The preparation of functionally graded materials (FGMs) of (TiB2)pNi with an intermetallic compound media layer of Ni3Al and a substrate of nickel by field-activated pressure-assisted synthesis process (FAPAS) was investigated. Ni3Al was chosen as a layer of FGM for the first time due to its great deal of heat released during its synthesis from nickel and aluminium powder. The microstructure, phase composition of layers, micro-hardness and elemental concentration profiles across interfaces were characterized. The significant inter-diffusion of elements between layers showed the formation of good bonds. The measured micro-hardness values of the sample increased monotonically to more than 3 500 HK over a distance of 2 mm from the nickel substrate to the surface layer (TiB2)pNi. The results of this investigation demonstrate the feasibility of the FAPAS process for rapid formation of FGMs with good diffusion bonds.