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Proceeding Paper

The Influence of CrAlN Coating Chemical Composition on Soldering Resistance in Contact with Al-Si-Cu Alloy †

1
Faculty of technical sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia
2
Jožef Stefan Institute, Jamova cessta 39, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Presented at the 2nd Coatings and Interfaces Web Conference, 15–31 May 2020; Available online: https://ciwc2020.sciforum.net/.
Mater. Proc. 2020, 2(1), 28; https://doi.org/10.3390/CIWC2020-06837
Published: 14 May 2020
(This article belongs to the Proceedings of 2nd Coatings and Interfaces Web Conference (CIWC-2 2020))
During the high pressure die casting (HPDC) process the die material is exposed to thermal fatigue, erosion, and corrosion. Corrosion leads to the soldering of cast alloy to tool surfaces which consequently bonds the casting with die material. Besides wear, such a process reduces the casting quality and production efficiency and endangers the tool integrity. Application of thin ceramic coatings on die surfaces reduces the soldering effects and improves the die performance. However, the development of ceramic coatings for these purposes still requires detailed information on the phenomena involved in these processes. In this study, the soldering performance of a complex nanolayer CrAlN coating, with three chemical compositions (high-Cr, balanced Cr:Al, and high-Al content) were evaluated. The cast alloy soldering was evaluated by the detachment test in three configurations. In this test, a simple casting is formed in contact with flat coated surfaces. Upon casting solidification, the formed joint is dismantled, and a force required for this process was recorded. To characterize and quantify the exhibited wear, after the detachment test, surfaces of the coated samples were analyzed by different microscopy techniques. Two forms of wear were detected on investigated samples. Cast alloy soldering processes induced the formation of thin layers of cast alloy on the surfaces of all investigated coatings. Additionally, substrate corrosion through the coating growth defects caused coating layer delamination during the detachment test. The evaluated coatings displayed different behaviors regarding the extent of wear and values of the detachment force. The coating with a balanced CrAlN composition exhibited the best soldering and corrosion resistance and displayed the lowest ejection force. In terms of soldering and corrosion resistance, the high-Al coating outperformed the high-Cr content coating. However, high-Al and high-Cr coating exhibited significantly higher and quite comparable values of detachment force. Based on the quantitative results it was postulated that, besides soldering and substrate corrosion, the casting-coating bonding strength depends also on “pure” sticking effects of cast alloy to coated surfaces.
Keywords: HPDC; aluminum alloy; cast alloy soldering; detachment test; nanolayer coating; CrAlN; corrosion; delamination HPDC; aluminum alloy; cast alloy soldering; detachment test; nanolayer coating; CrAlN; corrosion; delamination
MDPI and ACS Style

Terek, P.; Kukuruzović, D.; Kovačević, L.; Miletić, A.; Terek, V.; Škorić, B.; Panjan, P.; Čekada, M. The Influence of CrAlN Coating Chemical Composition on Soldering Resistance in Contact with Al-Si-Cu Alloy. Mater. Proc. 2020, 2, 28. https://doi.org/10.3390/CIWC2020-06837

AMA Style

Terek P, Kukuruzović D, Kovačević L, Miletić A, Terek V, Škorić B, Panjan P, Čekada M. The Influence of CrAlN Coating Chemical Composition on Soldering Resistance in Contact with Al-Si-Cu Alloy. Materials Proceedings. 2020; 2(1):28. https://doi.org/10.3390/CIWC2020-06837

Chicago/Turabian Style

Terek, Pal, Dragan Kukuruzović, Lazar Kovačević, Aleksandar Miletić, Vladimir Terek, Branko Škorić, Peter Panjan, and Miha Čekada. 2020. "The Influence of CrAlN Coating Chemical Composition on Soldering Resistance in Contact with Al-Si-Cu Alloy" Materials Proceedings 2, no. 1: 28. https://doi.org/10.3390/CIWC2020-06837

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