Affiliation:
1. University of California, Department of Materials Science and Engineering, Berkeley, California, U. S. A.
Abstract
Abstract
The vast majority of man-made devices contain joints between similar or dissimilar materials. Ideally, joining is fast, reliable, and inexpensive. In this work we demonstrate that robust refractory joints between Al2O3 bodies can be produced rapidly and consistently by a transient-liquid-phase bonding process exploiting microengineered multilayer Ni/Nb/Ni interlayers. Samples were bonded for times ranging from 5 min to 6 h at 1400°C. Well-bonded assemblies were produced in all cases. Interlayers with remelt temperatures > 2200°C were achieved in as little as 5 min at 1400°C. In room-temperature bend tests, fractures initiated and propagated almost exclusively in the ceramic. Extension of this approach to other advanced ceramics should be possible, providing a rapid and reliable alternative to conventional joining approaches.
Subject
Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics
Cited by
13 articles.
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