| http://www.w3.org/ns/prov#value | - In another embodiment of the invention a sandwich layer comprised of alternating layers of a non-precious refractory metal compound or non-precious refractory metal alloy compound and a non-precious refractory metal or non-precious refractory metal alloy is deposited over the refractory metal or refractory metal alloy layer such as zirconium or zirconium-titanium alloy.
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