Papers by Author: Jian Ming Yang

Abstract: For the purpose of powder injection molding of SiCp/Cu composite, it is studied that the reasonable choice of powder and binder, the determination of powder loading and the pretreatment of powder. Fabrication of feedstock is carried out by experiment, in which some issues are studied such as the temperature of mixing, the mixing sequence, the control of mixing uniformity and the control of oxidation of copper powder during the mixing. The results show that the mixing effect of powder with binder is well; the SiC particles are uniformly distributed in the Cu matrix and no obvious agglomeration of the particles exist.

Abstract: In this paper, the measurements of microhardness and tensile properties are performed to the electroformed Ni-Mn alloys which the mean grain size is near to or less than 100nm. It is studied that the effect of average deposition current density on microhardness and tensile properties of the alloys and the effect of post-electroforming annealing on microhardness of the alloys. The results show that with the increment of average current density, microhardness and strength of the alloys increase and elongation decreases because of the increment of Mn content and the decrement of grain size of the alloys. Microhardness of the alloys are slightly improved after annealing.