Effect of Sintering Temperature on Ni16Cr9Al Porous Material Performance

Abstract:

Using Ni16Cr9Al pre-alloy powder with ＜25 μm particles size as starting material, Ni16Cr9Al porous material was prepared by pressing and vacuum sintering. The effect of sintering temperature on Ni16Cr9Al porous material performance was researched. The results show that the shrinkage of the volume of Ni16Cr9Al green body will occur owing to forming and growing up of sintering-neck during the sinter. The porosity, the maximum and average pore sizes decrease and the shear strength of the Ni16Cr9Al porous materials increases with the increase of the sintering temperature. The Ni16Cr9Al porous material possesses a favorable three-dimensional meshwork after sintering at 1130 ℃. The porosity quantity decreases and the density of the Ni16Cr9Al material gradually increases after sintering over 1150 ℃