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INSPECTION METHOD FOR THE EFFECT OF COMPOSITION ON THE BOND STRENGTH OF A METALIZED ALUMINA CERAMIC

IP.com Disclosure Number: IPCOM000249405D
Publication Date: 2017-Feb-23
Document File: 5 page(s) / 597K

Publishing Venue

The IP.com Prior Art Database

Related People

Michael Petrucha: INVENTOR [+4]

Abstract

To have a proper MoMn metalized surface, the oxidation of the manganese and its reaction with the glassy phase of the alumina are critical factors. It is the presence of the glassy phase within the alumina that effects the bond strength of the final metalized ceramic. The glassy phase of the alumina is visible in specific areas of the brazed ceramic assembly after it is brazed or thermally processed in an Ar gas environment where the temperature is above ~780C. This disclosure is for the inspection method and also the equipment used to make this inspection possible in a production environment for the ceramics.

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INSPECTION METHOD FOR THE EFFECT OF COMPOSITION ON THE BOND STRENGTH OF A METALIZED ALUMINA CERAMIC

Brief Abstract

To have a proper MoMn metalized surface, the oxidation of the manganese and its reaction with the glassy phase of the alumina are critical factors. It is the presence of the glassy phase within the alumina that effects the bond strength of the final metalized ceramic. The glassy phase of the alumina is visible in specific areas of the brazed ceramic assembly after it is brazed or thermally processed in an Ar gas environment where the temperature is above ~780C. This disclosure is for the inspection method and also the equipment used to make this inspection possible in a production environment for the ceramics.

Background

During the manufacture of metalized alumina ceramic with a MoMn surface, the reaction of the manganese in the MoMn with the glassy phase of the alumina is the factor that ensures the bond strength of the metalized ceramic. Without the presence of the glassy phase within the alumina, the bond strength of the final metalized ceramic will be insufficient. The presence of the glassy phase of the alumina can be verified by visual inspection of specific areas of the brazed ceramic assembly after it is brazed or thermally processed in an argon gas environment where the temperature is above ~780 Celsius.

Problem Description

The inspection of the brazed ceramic assembly for the glassy phase of the alumina should optimally be performed by the ceramics ma...