|
| Abstract No.: |
|
Scheduled at:
|
Wednesday, May 04, 2022, Hall G2 11:50 AM
Arc Spraying
|
|
| Title: |
Adapting the thermal spraying technique to metalize the surfaces of 3D-printed polymer materials to improve its wear and erosion resistance.
|
|
| Authors: |
Mohamed Abdulgader* / University of Dortmund, Germany
Wolfgang Tillmann / Institute of materials engineering ,
Awwal Adesunkanmi/ Institute of materials engineering ,
|
|
| Abstract: |
Despite its light weight, 2.3 times lighter than Al, the use of polymers is limited to application with low wear, and abrasion. Thermal degradation of the polymers parts makes the enhancement of their functional surfaces a challenging task. The twin wire arc spraying (TWAS) process has the lowest heat output among the different thermal spraying techniques and reveals itself, therefore, as a promising solution for the required surface improvement. Metalizing the surface of the 3D-printed parts was done in two successive layers. The first layer is a TWAS coating made out of low melting materials to avoid the thermal degradation and provide a kind of bond coat. The top coat is also applied using a TWAS process and was made out of Ni-WSC (FTC) as cored wires. A comparison was made with Al specimens with equivalent dimensions. The top hard coating, containing Ni-WSC, has improved the wear resistance of the polymers by 14.6 times and 6.5 in the case of Al. The erosion of the coated and uncoated specimens was determined using a low pressure cold gas spray gun. Ni-WSC coating led to more than 5 times improvement in the case of polymers and 2 times by Al specimens.
|
|