Constrained metal flanges and methods for making the same

A flanged metal article comprising:

• (a) a wound first portion of a metal article comprising a length of a constraining metal member;
• and
• (b) a first braze compound in contact with the constraining metal member and a surface of the wound first portion of the metal article,
• wherein the metal article has a coefficient of thermal expansion CTE 1, the constraining metal member has a coefficient of thermal expansion CTE 2, and CTE 1 is greater than CTE 2.

A flanged article, comprising:

• (a) a flanged metal component joined to a ceramic component, wherein the flanged metal component is wound with a molybdenum wire and wherein the flanged metal component comprises one or more of nickel, iron, cobalt, and chromium;
• and
• (b) a first braze compound in contact with the flanged metal component and a surface of the molybdenum wire,
• wherein the flanged metal component has a coefficient of thermal expansion CTE 1, the molybdenum wire has a coefficient of thermal expansion CTE 2, and CTE 1 is at least 100% greater than CTE 2.

A method of making an article comprising a flanged metal component joined to a ceramic component, the method comprising:

• (a) applying a first braze compound to a first portion of a metal article;
• (b) winding the first portion of the metal article with a length of a constraining metal member;
• (c) heating an assembly of the metal article, the constraining metal member and the first braze compound to a temperature above the solidus temperature of the first braze compound to provide a flanged metal article, wherein the metal article has a coefficient of thermal expansion CTE 1, the constraining metal member has a coefficient of thermal expansion CTE 2, and CTE 1 is greater than CTE 2;
• (d) contacting a flanged portion of the flanged metal article with a second braze compound and a ceramic article such that the second braze compound is disposed between the flanged portion of the metal article and the ceramic article;
• and
• (e) heating an assembly of the flanged metal article, the second braze compound and the ceramic article to a temperature above the solidus temperature of the second braze compound to provide the article comprising the flanged metal component joined to the ceramic component.