Joining of alumina by using polycarbosilane and aluminum foil

Abstract

This paper describes a novel experiment in which alumina was joined using polycarbosilane (PCS) and an aluminum foil. PCS was used to design the surface structure of alumina, and the aluminum foil enabled the formation of an area that included the alumina surface designed using PCS; this area could be joined to ceramic materials. A four-point bending test revealed that the flexural strength of both the silicon carbide (SiC) and the silicon oxide (SiO 2 ) pieces that were obtained from alumina whose surfaces were modified to SiC or SiO 2 increased, compared with the flexural strength of ceramics joined by alternative methods involving the use of organometallic polymers whose compositions are similar to SiC and SiO 2 . Moreover, it was apparent that alumina was formed by the reaction of SiO 2 with aluminum. However, traces of Al and Si remained in the joining area in both the SiC and SiO 2 pieces.

Microstructure Evolution of Alumina/Alumina Joint Bonded by Boron Oxide–Alumina Nonmetal Powder Interlayer

“…Thus, nonmetal interlayer needs to be developed to join ceramics to avoid the generation of the residual stress. The recent literature reported that alumina can be bonded well by ceramic interlayer [16][17][18][19][20][21][22] such as Al 2 O 3 and SiC. Particularly, B 2 O 3 was used to join alumina by transient liquid phase 23 forming whiskers in the joint.…”