Method for encapsulating material to be processed by hot or warm isostatic pressing
AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorsTakao Fujikawa, Kazuhiko Nakajima, Yasuo Manabe
Life of this patent
Estimating the term…
Abstract
Described herein is a method of encapsulating a material to be processed by warm or hot isostatic pressing, and an apparatus suitable for practicing the method, which basically includes the steps of (a) enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m in thickness, and (b) welding overlying and underlying metal foil portions to encapsulate said material in said metal foil in sealed state.
Claims11
A method of encapsulating a material to be processed by warm or hot isostatic pressing comprising the steps of:
- a. enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m to 300 .mu.m in thickness, wherein said processing material is covered with a ceramic or ceramic and metal layer which prevents adhesion between the processing material and the metal foil capsule;
- and
- b. welding overlying and underlying metal foil portions to encapsulate said processing material in said metal foil in a sealed state.
A method of encapsulating a material to be processed by warm or hot isostatic pressing, said method comprising the steps of:
- a. enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m to 300 .mu.m in thickness, wherein said processing material is covered with a ceramic or ceramic and metal layer which prevents adhesion between the processing material and the metal foil capsule;
- and
- b. welding overlying and underlying foil portions in an inert gas atmosphere to encapsulate said processing material in said metal foil in a sealed state.
A method of encapsulating a material to be processed by warm or hot isostatic pressing, said method comprising the steps of:
- a. enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m to 300 .mu.m in thickness, wherein said processing material is covered with a ceramic or ceramic and metal layer which prevents adhesion between the processing material and the metal foil capsule;
- placing said processing material and enveloping metal foil in a chamber with a window;
- c. evacuating gases from said chamber by vacuum pumping;
- d. welding overlying and underlying metal foil portions with a beam projected through said window to encapsulate said processing material in said metal foil in a sealed state.
A method of encapsulating a material to be processed by warm or hot isostatic pressing, said method comprising the steps of:
- a. enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m to 300 .mu.m in thickness, wherein said processing material is covered with a ceramic or ceramic and metal layer which prevents adhesion between the processing material and the metal foil capsule;
- b. holding overlying and underlying metal foil portions in intimate contact with each other in such a manner as to make the gap width between said metal foil portions smaller than 1/10 of the thickness of said metal foil;
- c. welding the intimately contacting metal foil portions to encapsulate said processing material in said metal foil in a sealed state.
A method of encapsulating a material to be processed by warm or hot isostatic pressing, said method comprising the steps of:
- a. enveloping a processing material in the form of loose or compacted powder with a metal foil of 30 .mu.m to 300 .mu.m in thickness, wherein said processing material is covered with a ceramic or ceramic and metal layer which prevents adhesion between the processing material and the metal foil capsule;
- b. inserting an evacuation pipe into an opening of said bag-like metal foil and hermetically closing said opening on said pipe;
- c. evacuating gases from said bag-like metal foil by vacuum pumping through said evacuation pipe;
- and
- d. lap-welding said metal foil along a line between said processing material and said evacuation pipe to encapsulate said processing material in said metal foil in a sealed state.
Dependencies are inferred from the claim text.