Abstract
The present investigation demonstrated the comparative studies on interfacial joint strength of the alumina-alumina joints fabricated by conventional and microwave-assisted brazing techniques using scratch test method. Scratch tests were performed on cross-sectional surfaces of the alumina joints under steadily increasing normal loads up to 140 N. The scratches were made with a Rockwell C hardness tester stylus with 200 µm radius. The response of the joints was investigated by measuring the fluctuations in the tangential force during scratch test as well as by the examination of the scratch tracks. It was observed that microwave brazed joint had better interfacial joint strength in comparison to the conventionally brazed joint.
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