Free-flowing plasma spray powder
Abstract
Abstract THE PREPARATION OF METALLIC OXIDE LAYERS AND BODIES CONSISTING THEREOF BY THE PLASMA SPRAY DEPOSITION OF SUBSTANTIALLY SPHERICALLY-SHAPED AGGLOMERATE PARTICLES OF METAL OXIDES, THE PARTICLES BEING SUBSTANIALLY UNIFORM IN COMPOSITION AND HAVING AS AT LEAST ONE OF THE METAL OXIDES AN OXIDE OF A REFRACTORY METAL, IS DESCRIBED. SPECIFIC EXAMPLES INCLUDE A FREE-FLOWING POWDER OF SUCH SPHERICAL PARTICLES CONTAINING IN PHYSICAL COMBINATION(A) A FIRST METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF UNSTABILIZED ZIRCONIA AND UNDOPED THORIA AND (B) A SECOND METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, A MIXTURE OF RARE EARTH OXIDES, Y2O3 AND YB2O3 AND DESCRIBE THE DEPOSITION OF SUCH A POWDER BY PLASMA ARC SPRAYING. AS THE RESULT OF THIS METHOD OF DEPOSITION THE UNSTABILIZED ZRO2 BECOMES STABILIZED OR THE UNDOPED THO2 BECOMES DOPED. D R A W I N G
Inventors
- 👤 Casimir W Krystyniak
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |