ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Part II of this series presents applications of the modified laser spallation technique to several interface systems. For metal/pyrolytic graphite (PG) interfaces, the tensile strength of interfaces between 3-μm-thick coatings of Sn, Sb, Cu, Nb, Al, and Cr on a PG substrate were measured in units of MPa to be 18.53, 5.99, 15.46, 41.16, 16.53, and 15.47, respectively. It was found that the interface fracture mechanisms depend on the elastic-plastic properties of the coatings, but are independent of the interface strength. Interface strength between diamond, SnO2, and Nb coatings on polycrystalline alumina substrates were measured to be (approximately-greater-than)140, 320, and 280 MPa, respectively. It is shown that the brittle fracture takes place at the interface upon spalling even if the plastic deformation exists within the coatings.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.354699
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