Patent ID: 6733703
Filing Date: 2004-05-11
Classification: B22F,B28B,B29C,B29K,C04B,H01L

Abstract:
A method for achieving a preset shrinkage upon sintering of bodies made from mixtures of sinterable particulates and a thermoplastic organic binder by establishing the necessary volumetric composition of said mixtures needed to achieve said shrinkage, comprising:a. providing sinterable particulates and determining their density, b. sintering said sinterable particulates and determining the density of the resulting sintered body, c. determining the ratio of the sintered density to the density of said sinterable particulates, d. determining the desired shrinkage factor by dividing a mold cavity or green dimension by the corresponding desired sintered dimension, and e. establishing the necessary volumetric fraction of said particulates in a mixture of said particulates and a thermoplastic organic binder in order to achieve said shrinkage factor by dividing said density ratio by the cube of said shrinkage factor.