Some Properties of New Composite Powders Containing Boride and Aluminide Phases for Thermal Spraying Processes

1994 ◽  
Vol 13 (1) ◽  
pp. 1-16 ◽  
Author(s):  
B. Formanek, ◽  
B. Binczyk, ◽  
L. Swadzba,
Keyword(s):  
Thermal Spraying ◽  
Composite Powders

Plasma Spheroidized Alumina/Zircon Mixtures

2000 ◽  
Author(s):  
Y. Li ◽  
K.A. Khor
Keyword(s):  
Thermal Spraying ◽  
Processing Parameters ◽  
High Energy ◽  
Molten State ◽  
Composite Powders ◽  
Spray Process ◽  
Plasma Spheroidization ◽  
Plasma Spray Process ◽  
Energy Ball ◽  
Spheroidized Powder

Abstract The plasma-spray process is specified by the associated processing parameters, where these influence the properties of the resultant deposits. This article describes the preparation and processing of composite powders for use in thermal spraying by mixing high purity zircon and alumina powders. The spheroidized powder were obtained by high energy ball milling and rapid solidification from the molten state during plasma spraying. The article discusses the processes involved in spray drying and plasma spheroidization, describing thermal analysis and mullitization kinetics in the spheroidized alumina/zircon mixtures.

Influence of CaSi2 and Si Additions on Properties of Coatings Produced by Plasma Spraying of Composite Powders

1997 ◽  
Author(s):  
Yu. Borisov ◽  
A. Borisova ◽  
A. Tunik ◽  
M. Knyaz ◽  
V. Bobrik
Keyword(s):  
Plasma Spraying ◽  
Oxygen Content ◽  
Thermal Spraying ◽  
Base Material ◽  
High Density ◽  
High Grade ◽  
Melt Flow ◽  
Properties Of Coatings ◽  
Composite Powders ◽  
Si Content

Abstract Addition of CaSi2 in steel melt leads to a decrease of oxygen content, an increase of the melt flow capability, an improvement of a metal ductility and weldability. For an estimation of CaSi2 and Si additions effect in conditions of thermal spraying composite powders were produced. A base material of these powders particles is nickel, nichrom and iron. CaSi2 and Si are additional components of the powders (3-12 wt. %). Plasma coatings produced with using of these powders exhibit high density and adhesion. The coatings structure has a high grade of microcrystallinity with a decreasing size of lamels. Oxides content in the coatings decreases with an increasing of CaSi2 and Si content in the composite powders, moreover this effect is more essential in case of CaSi2 addition. Addition of CaSi2 and Si to Ni-base coatings increases a microhardness from 1900-2000 MPa to 2200-2850 MPa. In case of NiCr-base coatings this increasing is from 1800-2100 MPa to 2400-3500 MPa.

Microstructure Characterization of Superfine WC-Co Powders

2013 ◽  
Vol 203-204 ◽  
pp. 351-354 ◽  
Author(s):  
Grzegorz Moskal ◽  
Krzysztof Szymański ◽  
Agnieszka Tomaszewska ◽  
Hanna Myalska
Keyword(s):  
Phase Composition ◽  
Chemical Composition ◽  
Thermal Spraying ◽  
Point Of View ◽  
Microstructural Properties ◽  
Technological Properties ◽  
Composite Powders ◽  
Distribution Maps ◽  
Macro Scale

In this paper results of tests concerning the WC/Co fine-crystalline composite powders type 88/12 and 83/17 provided for thermal spraying of layers resistant to abrasion are presented. Tests which characterize basic technological properties were performed since these properties are essential from thermal spraying point of view. Microstructural properties are essential as well because they allow evaluation of morphology of powders by SEM method with an analysis of chemical composition in micro-areas. Moreover, the phase composition was characterized by XRD in macro scale and by EBSD in microareas including distribution maps of individual phase components in all particles of the powders.

Composite powders based on FeMoNiCrB amorphizing alloy with additives of refractory compounds for thermal spraying of coatings

2021 ◽  
Vol 2021 (11) ◽  
pp. 38-47
Author(s):  
Yu.S. Borysov ◽  
◽  
A.L. Borysova ◽  
O.M. Burlachenko ◽  
T.V. Tsymbalista ◽  
...  
Keyword(s):  
Thermal Spraying ◽  
Composite Powders ◽  
Refractory Compounds

Composite Powders Based on Metal Silicides FeSi2 and MoSi2 for Thermal Spraying

2006 ◽  
pp. 181-187
Author(s):  
I. Morgenthal ◽  
R. Scholl ◽  
B. Wielage ◽  
S. Steinhäuser ◽  
G. Reisel ◽  
...  
Keyword(s):  
Thermal Spraying ◽  
Composite Powders ◽  
Metal Silicides

Development of composite powders and coatings for protection and restoration of products under significant temperature exposure during operation

2020 ◽  
pp. 70-78
Author(s):  
T. I. Bobkova ◽  
A. A. Grigoriev ◽  
D. S. Zhirov
Keyword(s):  
Experimental Data ◽  
Thermal Spraying ◽  
Engineering Industry ◽  
Titanium Matrix ◽  
Composite Powders ◽  
Powder Composites ◽  
Significant Temperature ◽  
Temperature Exposure ◽  
Sprayed Coatings ◽  
Nanostructured Powders

The paper presents results of studies aimed at expanding the range of domestic powder composites for thermal spraying of coatings with great number of performance characteristics used in the power engineering industry. Experimental data on the synthesis of nanostructured powders based on a titanium matrix and reinforced with ceramic nanopowders are presented. Some properties of sprayed coatings are investigated.

Fabrication of Ti(Al,O)-Al2O3 Powder Feedstock for Thermal Spraying and Evaluation of Composite Coating

2007 ◽  
Vol 534-536 ◽  
pp. 421-424 ◽  
Author(s):  
Peng Cao ◽  
Brian Gabbitas ◽  
Ling Zheng ◽  
De Liang Zhang
Keyword(s):  
Thermal Fatigue ◽  
Thermal Spraying ◽  
High Energy ◽  
Fatigue Tests ◽  
H13 Steel ◽  
Composite Powders ◽  
Thermally Sprayed Coatings ◽  
Steel Substrates ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Ti(Al,O)-Al2O3 composite powders were produced by high energy mechanical milling of a mixture of Al and TiO2 powders followed by combustion reaction. The powders were then thermally sprayed on H13 steel substrates. Microstructural examination was conducted on the composite powders and thermally sprayed coatings using X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The performance of the coatings was evaluated in terms of microhardness and thermal fatigue. The thermally sprayed coatings showed fairly good performance in the preliminary thermal fatigue tests and did not display any wetting tendency to molten aluminum.

Clad TiCrC(Ni) Composite Powders for Thermal Spraying of Coatings

2021 ◽  
Author(s):  
M. S. Storozhenko ◽  
O. P. Umanskyi ◽  
G. A. Baglyuk ◽  
Yu. I. Evdokimenko ◽  
V. P. Brazhevskyi ◽  
...  
Keyword(s):  
Thermal Spraying ◽  
Composite Powders
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