PRODUCTION OF SINTERED BODY BY HOT ISOTROPIC PRESSURIZATION

摘要

PURPOSE: To obtain a sintered body having high density and excellent properties in high yield by putting a shaped body to be treated in a glass container, putting a lid having an air hole on a sheath, enabling the lid not to move by its weight or by fixing the lid to the sheath and treating by hot isotropic press(HIP). ;CONSTITUTION: This method for producing a hot isotropic pressurized sintered body is to deaerate and seal a shaped body to be treated in a glass container having no clearance between the shaped body and the container to make a glass capsule, put the glass capsule in a heat resistant sheath, cover the total system with the sheath and a lid to leave no space, make an air hole on the lid attached to the sheath, put glass pieces in the hole and treat the capsule by HIP. The figure shows an example. The shaped body 1 having a cylindrical shape is put into the cylindrical glass container capable of receiving the shaped body without leaving a clearance and having a reaction protecting layer 7 comprising boron nitride, then, deaerated and sealed. The capsule is put into the sheath 3 made of graphite and a reaction-protecting layer 4 made of boron nitride is formed. The lid 5 is put on the sheath 3 and glass beads 6 are filled in the air hole. This is treated by HIP.;COPYRIGHT: (C)1996,JPO