Grechanyuk N.I., Grechanyuk V.G., Grechanyuk N.I., Grechanyuk V.G., Manulyk A.F.
Synergy ANTECH Services Corp., CA
Keywords: bulk materials, copper, layered materials, Molybdenum, precipitation-strengthened materials, rapid evaporation-condensation, vacuum
The phase composition and structurization of three types of copper and molybdenum composite materials, 0.8 to 5 mm thick, were condensed from the vapor phase at substrate temperatures 700 and 900 0C. They are considered: precipitation-strengthened composites, micro layered composites with alternating copper and molybdenum layers 1 to 10 μm thick, and bulk nanocrystalline composites with alternating layers thinner than 0.5 μm. Standard precipitation- strengthened Cu- and Mo-based materials condensed from the vapor phase at substrate temperatures 700–900 0C can be produced over the strengthening phase’s relatively narrow composition range (0.1–3 wt.% Mo). When Mo content is 3–5 wt.%, the molybdenum particles change their shape from round to acicular in chains form oriented perpendicularly to the vapor flow. If more than 5 wt.% of the second phase, the condensed composite materials (CCMs) show a layered structure. The layered structure can be observed in other CCM types (Cu–W, Cu–Cr, NiCrAlTi– Al2O3). Layered copper and molybdenum CCMs, 6 mm thick, produced on a rotating substrate heated to 700 ± 30 0C have been experimentally confirmed to belong to bulk nanocrystalline materials.
Journal: TechConnect Briefs
Volume: TechConnect Briefs 2021
Published: October 18, 2021
Pages: 71 - 74
Industry sector: Advanced Materials & Manufacturing
Topics: Advanced Materials for Engineering Applications, Materials Characterization & Imaging
ISBN: 978-0-578-99550-2