Plasma producing gas for plasma projection of metallic oxide

US5271869A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Daniel Nicoud · Metz, FR
• Jean-Martial Leger · Saint-Quentin, FR
• Pierre Fauchais · Limoges, FR
• Alain Grimaud · Saint Bonnet, FR

Key dates

• Filing date: Mar 28, 1991
• Grant date: Dec 21, 1993
• Expiry date: Mar 28, 2011

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05H1/42
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The plasma producing gas consists of a ternary mixture of helium, argon and hydrogen and contains at least about 10% hydrogen, typically 30 to 70% helium, 10 to 50% argon and 10 to 25% hydrogen, preferably 20% (.+-.5%) hydrogen. Use for the plasma projection of metallic oxide.