Abstract
Abstract The growth of polycrystalline diamond films on WC substrate has been investigated by transmission electron microscopy. Preferential growth of columnar subgrains of 10–50 nm in diameter results in the formation of large grains with 4 μm spacing. The interfacial stress between diamond and WC is accommodated by twins and stacking faults. Graphite layers of 10–40 nm in thickness are observed locally, but mostly the diamond is deposited directly on WC grains.
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