Braze materials and method for joining of ceramic matrix composites
AssigneesROLLS-ROYCE plc, Rolls-Royce North American Technologies Inc.
InventorsRaymond R. Xu, Ted J. Freeman
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Abstract
A method of coupling two ceramic matrix composite components comprises procuring a first ceramic matrix composite component, procuring a second ceramic matrix composite component, and applying a melt alloy between the first and second ceramic matrix components. The melt alloy comprises a homogeneous mixture of two or more materials in powder form, where the two or more materials include a braze alloy comprising silicon and a high melting point material or alloy. The first and second ceramic matrix composite components and the melt alloy are heat treated to a temperature, and the temperature is maintained for a length of time, followed by cooling, thereby coupling the first and second ceramic matrix composite components.
Claims17
A melt alloy for use as a braze material for joining ceramic matrix composites, the melt alloy comprising:
- a homogeneous mixture of two or more materials in powder form, one of the two or more materials being a braze alloy comprising silicon and another of the two or more materials being a high melting point material or alloy,
- wherein the homogeneous mixture of the two or more materials in powder form is selected from the group consisting of (in wt. %):
- Ti-9Si (5%)+71Si—Cr (95%), 75Si—Ti (97%)+C (3%), 75Si—Ti (97%)+B (3%), 75Si—Ti (50%)+71Si—Cr (50%), 75Si—Ti (50%)+Ti-43Cr (50%), 75Si—Ti (50%)+12.5Si—Co (50%), and Ti-25Cr-23Si (97%)+C (3%).
A method of coupling two ceramic matrix composite components, the method comprising the operations of:
- procuring a first ceramic matrix composite component;
- procuring a second ceramic matrix composite component;
- applying a melt alloy between the first and second ceramic matrix components, the melt alloy comprising a homogeneous mixture of two or more materials in powder form, where the two or more materials in powder form include a braze alloy comprising silicon and a high melting point material or alloy, the braze alloy including up to about 75 wt. % Si and being selected from the group consisting of (in wt. %):
- Ti-9Si, Ti-25Cr-23Si, 71Si—Cr, and 75Si—Ti;
- heat treating the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy to a temperature;
- maintaining the temperature for a length of time;
- and
- cooling the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy,
- thereby coupling the first and second ceramic matrix composite components.
A method of coupling two ceramic matrix composite components, the method comprising the operations of:
- procuring a first ceramic matrix composite component;
- procuring a second ceramic matrix composite component;
- applying a melt alloy between the first and second ceramic matrix components, the melt alloy comprising a homogeneous mixture of two or more materials in powder form, where the two or more materials in powder form include a braze alloy comprising silicon and a high melting point material or alloy;
- heat treating the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy to a temperature;
- maintaining the temperature for a length of time;
- and
- cooling the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy,
- thereby coupling the first and second ceramic matrix composite components,
- wherein the homogeneous mixture of the two or more materials in powder form is selected from the group consisting of (in wt. %):
- Ti-9Si (5%)+71Si—Cr (95%), 75Si—Ti (97%)+C (3%), 75Si—Ti (97%)+B (3%), 75Si—Ti (50%)+71Si—Cr (50%), 75Si—Ti (50%)+Ti-43Cr (50%), 75Si—Ti (50%)+12.5Si—Co (50%), and Ti-25Cr-23Si (97%)+C (3%).
A method of coupling two ceramic matrix composite components, the method comprising the operations of:
- procuring a first ceramic matrix composite component;
- procuring a second ceramic matrix composite component;
- applying a melt alloy between the first and second ceramic matrix components, the melt alloy comprising a homogeneous mixture of two or more materials in powder form, where the two or more materials in powder form include a braze alloy comprising silicon and a high melting point material selected from the group consisting of C, B and TiH;
- heat treating the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy to a temperature;
- maintaining the temperature for a length of time;
- and
- cooling the first ceramic matrix composite component, the second ceramic matrix composite component, and the melt alloy,
- thereby coupling the first and second ceramic matrix composite components.
Dependencies are inferred from the claim text.