| 摘要 |
PURPOSE:To accomplish the densification treatment of porous sintered form and sintering of green compact in a capsule by making a HIP treatment in an oxygen atmosphere under specified conditions using silver (alloy) as an oxygen gas-selectively permeable capsule material. CONSTITUTION:A silver (alloy) capsule 1 is packed with an object to be treated 10 such as porous sintered form or green compact form suitable for treatment in an oxidative atmosphere. The resultant capsule 1 is then put to HIP treatment in an oxygen atmosphere at temperatures below the melting point of silver. Because of falling in the melting point of silver with increasing in oxygen partial pressure, said HIP treatment is made at <=770 deg.C, <=700 deg.C, <=620 deg.C or <=540 deg.C under an oxygen partial pressure of 100kgf/cm<2>, 200kgf/cm<2>, 300kgf/cm<2> or 400kgf/cm<2>, respectively. |
