Ceramic Joining

In many applications the need to replace metallic components with fiber-reinforced ceramic matrix composites (CMCs) is needed in order to meet the growing need for increased performance at high temperatures.  One impediment to the commercialization of CMC components is the ability to join ceramic materials.  The development of ceramic joining methods will (i) enable the repair of CMC parts, (ii) allow for CMC to CMC joins that minimize fabrication costs for complex shaped components and (iii) enable the attachment of CMC parts to metallic structures.

KDT offers polysilazane resins that are excellent adhesives in the high strength joining of ceramic parts.  Joining of ceramic parts is easily achieved by applying a paste of the polysilazane made with SiC or other ceramic powder, followed by pyrolysis of the part to convert the polymer to a ceramic.  The strength of the join is typically stronger than the ceramic part and the resulting joined composite retains mechanical properties at high temperatures.

Benefits of Using KDT Polysilazanes for Ceramic Joining

• High thermal stability
• High ceramic yield; > 75 % at 1400 °C
• Joint strength higher than ceramic part
• Low shrinkage and porosity
• Retention of mechanical properties upon thermal cycling

KDT Products Ceramic Joining:

• KDT Ceraset Polysilazane 20
• KDT Ceraset Polyureasilazane