초록 ▼

A method for determining the generation of a diffusion bond between two articles is disclosed. The two articles are sealed together to define a cavity therebetween. A vacuum is drawn in the cavity by means of an evacuation tube having a passageway. The passageway is then sealed and the articles are

A method for determining the generation of a diffusion bond between two articles is disclosed. The two articles are sealed together to define a cavity therebetween. A vacuum is drawn in the cavity by means of an evacuation tube having a passageway. The passageway is then sealed and the articles are subjected to a temperature and pressure to diffusion bond the articles together. A successful diffusion bond can be determined if the evacuation tube sidewall is collapsed.

대표청구항 ▼

A method for diffusion bonding first and second mating articles defining a cavity therebetween, comprising: tack welding the first article to the second article at several locations; providing an evacuation tube having a sidewall and a passageway therethrough, sealing the evacuation tube in a hole d

A method for diffusion bonding first and second mating articles defining a cavity therebetween, comprising: tack welding the first article to the second article at several locations; providing an evacuation tube having a sidewall and a passageway therethrough, sealing the evacuation tube in a hole defined in the articles and sealing the evacuation tube and the periphery of said mating articles together and defining a cavity between the articles with said evacuation passageway in communication with said article cavity; drawing air through the passageway of the evacuation tube to verify that the passageway remained open after sealing the evacuation tube and prior to sealing the periphery of the mating articles; drawing a vacuum in the article cavity and the tube passageway; testing the vacuum integrity of the cavity; sealing the passageway at a location spaced from the sealed articles; subjecting the sealed articles having the associated evacuation tube to a temperature and pressures sufficient to diffusion bond the articles together; inspecting the associated evacuation tube and determining successful diffusion bonding of the articles in response to the evacuation tube sidewall being collapsed, providing visual confirmation that the seal was maintained during hot isostatic pressing and determining the unsuccessful diffusion bonding of the articles in response to the evacuation tube sidewalls not being collapsed.