Tungsten and its alloys — including W-Ni-Fe and W-Ni-Cu heavy alloys and tungsten-rhenium compositions — used in aerospace for high-temperature structural components, radiation shielding, kinetic energy penetrators, and rocket nozzle throat inserts, processed via powder metallurgy, sintering, and chemical vapour deposition (CVD) to exploit its exceptional density, hardness, and refractory properties above 3,000 °C.
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