| 摘要 |
A capsule is made of a circular tube-type metal vessel, which has thin outer and inner walls. First, one side of the capsule end is corked with a circular-type cork, then metal or metal alloy powder, a mixture of metal powder-metal alloy powder or a mixture of metal powder-metal alloy powder-ceramic powder is poured into the capsule. The compacted vessel until the density of the abovementioned powder increases to 60-70% of its theoretical density. The capsule is made completely air-tight by corking the other side of the capsule end with another cork. Finally, the air-tight and its contents are capsule is compressed to 80-93% of the theoretical density under a uniform cold pressure. of at least 1500 b.p.
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