PLASMA-SPHEROIDIZED CERAMIC POWDER

摘要

FIELD: inorganic protective coatings. ^ SUBSTANCE: invention provides preparation of chemically homogeneous powder suitable for thermal spraying. Zirconium dioxide is first subjected to electric fusion using up to 60% by weight of oxide appropriate to stabilize zirconium dioxide in tetragonal phase followed by sharp cooling of thus obtained stabilized zirconium dioxide and heat treatment to form mainly spherical hollow particles of stabilized zirconium dioxide 200 mum or less in size. Powder suitable for applying thermal barrier-forming coating onto a substrate contains morphologically and chemically uniform stabilized zirconium dioxide including spheroidized hollow particles. ^ EFFECT: optimized preparation process. ^ 7 cl, 5 dwg, 1 tbl