scholarly journals Properties of the Ni-Al Composite Powders Prepared by the Mechanofusion Process and their Plasma Sprayed Coatings.

1993 ◽  
Vol 40 (2) ◽  
pp. 241-246 ◽  
Author(s):  
Mikio Umakoshi ◽  
Hiroshi Ito ◽  
Ryozo Nakamura ◽  
Tohei Yokoyama ◽  
Kiyoshi Urayama ◽  
...  
Keyword(s):  
Composite Powders ◽  
Al Composite ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Mechanofusion Processing of Metal-Oxide Composite Powders for Plasma Spraying

2010 ◽  
Vol 1276 ◽  
Author(s):  
Ricardo Cuenca-Alvarez ◽  
Carmen Monterrubio-Badillo ◽  
Hélêne Ageorges ◽  
Pierre Fauchais
Keyword(s):  
Mechanical Energy ◽  
Xrd Analysis ◽  
Composite Particles ◽  
Composite Powders ◽  
Steel Core ◽  
No Formation ◽  
Particle Coating ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

AbstractComposite particles destined to build plasma sprayed coatings, are prepared by the mechanofusion process (MF). These particles consist of a stainless steel core particle coated by finer particles of alumina. Changes induced by the MF process are monitored by SEM, DRX, and laser granulometry, revealing that the dry particle coating process is governed by agglomeration and rolling phenomena. Simultaneously, the MF performance is controlled by the operating parameters such as the compression gap, the mass ratio of host to guest particle, and the powder input rate. The mechanical energy input leads to a nearly rounded shape of the final composite particles; however, no formation of new phases or components decomposition is detected by XRD analysis. The resulting composite powder features optimal characteristics, concerning particle shape and phases distribution, to be plasma sprayed in air.

Novel Zro2-Mullite Composites Produced by Plasma Spraying

1998 ◽  
Author(s):  
K.A. Khor ◽  
Y. Li
Keyword(s):  
Plasma Spraying ◽  
Structural Integrity ◽  
Plasma Jet ◽  
Distilled Water ◽  
Composite Powders ◽  
Plasma Flame ◽  
Amorphous Phases ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Abstract Zirconia can induce enhanced fracture toughness to a number of ceramics when introduced as a reinforcement either in the form of particulates, dispersed phase or whiskers because of its unique tetragonal-monoclinic (t-*m) transformation. This paper presents the preparation of Zr0 2 reinforced mullite by plasma spraying a mixtures of zircon and alumina. The dissociation of zircon into zirconia and silica in a plasma flame is well-known. Pre-mixed powders of zircon and alumina are injected into a dc plasma jet. The plasma sprayed particles are collected in distilled water and analyzed. The results indicate that the plasma sprayed powders consist of zirconia, zircon and alumina. It was found that fine, mostly amorphous and chemically homogeneous composite powders can be obtained by ball milling and plasma spraying. Recrystallization of amorphous phases and formation of mullite occurred at about 1000 °C in plasma sprayed powders. This value is more than 500 °C lower than the formation of mullite in as-milled powders. Uniform coatings with good structural integrity were obtained by plasma spraying. The amount of amorphous phases was much higher in plasma sprayed coatings than in spheroidized powders, and the relative quantity of mullite in coatings after heat treatment is about 4 times as much as that obtained in the spheroidized powders.

CHARACTERIZATION OF AS-SPRAYED AND LASER-TREATED ZIRCONIA-BASED PLASMA SPRAYED COATINGS

1990 ◽  
Vol 51 (C5) ◽  
pp. C5-393-C5-402
Author(s):  
A. FERRIERE ◽  
G. FLAMANT ◽  
J.-F. ROBERT ◽  
P. PEKSHEV ◽  
I. SMUROV ◽  
...  
Keyword(s):  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Investigation of agricultural tools with plasma-sprayed coatings

1990 ◽  
Vol 23 (5) ◽  
pp. 297-300 ◽  
Author(s):  
R.L. Kushwaha ◽  
L. Chi ◽  
C. Roy
Keyword(s):  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

XPS studies on cerium, zirconium and yttrium valence states in plasma-sprayed coatings

1990 ◽  
Vol 16 (1-12) ◽  
pp. 515-519 ◽  
Author(s):  
G. M. Ingo ◽  
E. Paparazzo ◽  
O. Bagnarelli ◽  
N. Zacchetti
Keyword(s):  
Valence States ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings
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