Patent · US Active

One-step methods for creating fluid-tight, fully dense coatings

US11965251B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

Praxair S.T. Technology, Inc. · US

Inventors

Daming Wang · Carmel, US
Ardy Kleyman · Carmel, US
Kasey Hughes · Crawfordsville, US

Key dates

Filing date	Aug 5, 2019
Grant date	Apr 23, 2024
Priority date	—
Expiry date	Aug 5, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB05B7/205
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A fluid tight, fully-densified, coating is prepared by a High Velocity Oxygen Fuel (“HVOF”) process that dilutes oxygen with an inert gas. The inert gas is pre-mixed with oxygen prior to the oxygen entering a combustion chamber. The resultant flame temperature is lowered a controlled amount to eliminate, minimize or reduce oxidation of power feedstock that is injected into the thermal spray torch. The ability to reduce the flame temperature allows a relatively smaller particle feedstock to be deposited without significant oxidation. The dilution process creates an as-deposited fully-dense, fluid tight coating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.