Chemical Economics of Spray Processing*-->

1949 ◽  
Vol 53 (6) ◽  
pp. 665-690 ◽  
Author(s):  
Gerald I. P. Levenson
Keyword(s):  
Spray Processing

The Mechanical Properties of Combustion-Sprayed Polymers and Blends

1996 ◽  
Author(s):  
J.A. Brogan ◽  
C.C. Berndt ◽  
A. Claudon ◽  
C. Coddet
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Yield Strength ◽  
Deposition Temperature ◽  
Processing Parameters ◽  
Low Energy ◽  
Melt Compounding ◽  
Acid Copolymer ◽  
Spray Processing ◽  
Break Water

Abstract The mechanical properties of EMAA copolymer are dependent upon the thermal spray processing parameters. The parameters determine coating temperatures which, in turn, affects the microstructure. If the deposition temperature is too low, (104 °C for PFl 13 and 160 °C for PFl 11) coatings have low strengths and low energy to break values. Increased coating temperatures allow the particles to fully coalesce resulting in maximized strength and elongation to break. However, at 271 °C, PFl 11 had visible porosity which decreased both strength and elastic modulus. Pigment acts as reinforcement in the sense that the modulus increased but the elongation to break decreased, thus reducing the energy to break. Water quenching reduces the elastic modulus and yield strength, but increases the elongation to break for both EMAA formulations. The mechanical properties of post consumer commingled plastic and PCCP / EMMA blends improved if the recycled plastic was pre-processed by melt-compounding. Melt compounding increased the strength and toughness by improving the compatibility among the various polymer constituents. The addition of PCCP increases the modulus and yield strength of ethylene methaciylic acid copolymer.

Thermal Spray Processing of WC-Co Nanomaterials

2000 ◽  
Author(s):  
J. Voyer ◽  
B.R. Marple
Keyword(s):  
Phase Composition ◽  
Recent Work ◽  
Phase Analysis ◽  
Thermal Spraying ◽  
Volume Percent ◽  
Wear Properties ◽  
Lower Porosity ◽  
Hvof Thermal Spraying ◽  
Spray Processing ◽  
Sprayed Coatings

Abstract WC-Co based cermets are extensively used in wear applications due to their hardness and toughness. Recent work has demonstrated the potential for using nanoscale constituents to improve the wear properties of these materials. In the present study, two WC-Co powders containing a nanosized WC phase were used to produce coatings by HVOF thermal spraying. These powders had similar properties except for the volume percent binder present: WC-8C0 and WC-12Co. The thermal spraying conditions were varied in order to identify their effect on the microstructure, properties and phase composition of the sprayed coatings. The as-sprayed coatings possess porosity values ranging between 1% and 2% and microhardness values (HV100) from 1150 to 1550, which are quite similar to values obtained for conventionally sized WC-based coatings. For all the coatings, phase analysis indicated significant degradation of the WC phase to produce W2C, W, CO3W3C and Co6W3C. For some spray conditions, even WO3 phase was found in the coatings. The JP-5000 HVOF system produces coatings with lower porosity, similar microhardness values and, more importantly, with lower WC degradation than the coatings produced with the DJ-2700.

Optimization of Inconel 718 thick deposits by cold spray processing and annealing

2019 ◽  
Vol 378 ◽  
pp. 124997 ◽  
Author(s):  
L.I. Pérez-Andrade ◽  
F. Gärtner ◽  
M. Villa-Vidaller ◽  
T. Klassen ◽  
J. Muñoz-Saldaña ◽  
...  
Keyword(s):  
Cold Spray ◽  
Inconel 718 ◽  
Spray Processing

Grey modeling for thermal spray processing parameter analysis

2020 ◽  
Vol 10 (3) ◽  
pp. 265-279 ◽  
Author(s):  
Meimei Liu ◽  
Yicha Zhang ◽  
Wenjie Dong ◽  
Zexin Yu ◽  
Sifeng Liu ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Processing Parameters ◽  
Industrial Applications ◽  
Parameter Analysis ◽  
Processing Parameter ◽  
Content Type ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Non Linear ◽  
Spray Processing

PurposeThis paper presents the application of grey modeling for thermal spray processing parameter analysis in less data environment.Design/methodology/approachBased on processing knowledge, key processing parameters of thermal spray process are analyzed and preselected. Then, linear and non-linear grey modeling models are integrated to mine the relationships between different processing parameters.FindingsModel A reveals the linear correlation between the HVOF process parameters and the characterization of particle in-flight with average relative errors of 9.230 percent and 5.483 percent for velocity and temperature.Research limitations/implicationsThe prediction accuracies of coatings properties vary, which means that there exists more complex non-linear relationship between the identified input parameters and coating results, or more unexpected factors (e.g. factors from material side) should be further investigated.Practical implicationsAccording to the modeling case in this paper, method has potential to deal with other diverse modeling problems in different industrial applications where challenge to collecting large quantity of data sets exists.Originality/valueIt is the first time to apply grey modeling for thermal spray processing where complicated relationships among processing parameters exist. The modeling results show reasonable results to experiment and existing processing knowledge.

Dust Explosion Characteristics of Aluminum, Titanium, Zinc, and Iron-Based Alloy Powders Used in Cold Spray Processing

2013 ◽  
Vol 23 (1-2) ◽  
pp. 123-130 ◽  
Author(s):  
K. Sakata ◽  
K. Tagomori ◽  
N. Sugiyama ◽  
S. Sasaki ◽  
Y. Shinya ◽  
...  
Keyword(s):  
Cold Spray ◽  
Dust Explosion ◽  
Spray Processing ◽  
Iron Based ◽  
Titanium Zinc

Thermal spray processing of nanoscale materials

1997 ◽  
Vol 8 (6) ◽  
pp. 765-769 ◽  
Author(s):  
B.H. Kear ◽  
G. Skandan
Keyword(s):  
Thermal Spray ◽  
Nanoscale Materials ◽  
Spray Processing
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