Lower temperature fabrication of continuous intermetallic coatings on AZ91D magnesium alloy in molten salts

Zhong, Cheng; He, Meifeng; Liu, Lei; Wu, Yating; Chen, Yujuan; Shen, Bin; Hu, Wenbin

doi:10.1016/j.jallcom.2010.05.120

Cited by 39 publications

(17 citation statements)

References 19 publications

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“…Recently, salt baths have also been developed for the formation of diffusion coatings by our group [39,40]. The baths contain the coating-metal halide together with a salt mix which is fused at the process temperature.…”

Section: Molten Salt Bathmentioning

confidence: 99%

Protective diffusion coatings on magnesium alloys: A review of recent developments

Zhong

Fan

et al. 2012

Journal of Alloys and Compounds

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157

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Section: Molten Salt Bathmentioning

confidence: 99%

Protective diffusion coatings on magnesium alloys: A review of recent developments

Zhong

Fan

et al. 2012

Journal of Alloys and Compounds

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157

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“…Al-enriched layers can be produced using various methods, e.g. laser surface alloying/cladding [3][4][5], diffusion treatment in molten salts [6,7], diffusion aluminizing treatment [8][9][10][11][12][13][14][15], PVD combined with annealing [16][17], cold spray with subsequent heat treatment [18,19], welding [20], and electrodeposition [21]. The findings reported in the above works suggest that it is the Mg-Al intermetallic phases forming in the microstructure of Al-enriched layers that are responsible for an increase in the hardness as well as corrosion and wear resistance of magnesium and magnesium alloy products.…”

Section: Introductionmentioning

confidence: 99%

Formation of Al-alloyed Layer on Magnesium with Use of Casting Techniques

Mola

Bucki

Dziadoń

2016

Archives of Foundry Engineering

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Al-enriched layer was formed on a magnesium substrate with use of casting. The magnesium melt was cast into a steel mould with an aluminium insert placed inside. Different conditions of the casting process were applied. The reaction between the molten magnesium and the aluminium piece during casting led to the formation of an Al-enriched surface layer on the magnesium substrate. The thickness of the layer was dependent on the casting conditions. In all fabricated layers the following phases were detected: a solid solution of Mg in Al,

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“…Many different coating materials, including nitrides and carbonitrides of metals [8][9][10], DLC coatings [11][12], alloy coatings [13] and layers, containing diffusion layers [14] and implanted layers [15] are deposited using these methods. Among this group of materials the deserve particular attention that layers, one Al-Mg intermetallic diffusion layers [16] and the diffusion layers of metal nitrides [17] which in a case of AZ91D significantly increase its hardness and corrosion resistance. The high potential of increasing the efficiency of modification of the properties of surface layer of magnesium alloys create the hybrid surface treatment technologies combining different methods of forming the surface layer properties in one multistage technological process [18].…”

Section: Introductionmentioning

confidence: 99%

Composite Layers “MgAl Intermetalic Layer / PVD Coating” Obtained On The AZ91D Magnesium Alloy By Different Hybrid Surface Treatment Methods

Smolik¹,

Mazurkiewicz²,

Kacprzyńska–Gołacka³

et al. 2015

Archives of Metallurgy and Materials

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Magnesium alloys have very interesting physical properties which make them 'materials of the future' for tools and machine components in many industry areas. However, very low corrosion and tribological resistance of magnesium alloys hampers the implementation of this material in the industry. One of the methods to improve the properties of magnesium alloys is the application of the solutions of surface engineering like hybrid technologies. In this paper, the authors compare the tribological and corrosion properties of two types of "MgAl itermetalic / PVD coating" composite layers obtained by two different hybrid surface treatment technologies. In the first configuration, the "MgAl itermetalic / PVD coating" composite layer was obtained by multisource hybrid surface treatment technology combining magnetron sputtering (MS), arc evaporation (AE) and vacuum heating methods. The second type of a composite layer was prepared using a hybrid technology combined with a diffusion treatment process in Al-powder and the electron beam evaporation (EB) method. The authors conclude, that even though the application of "MgAl itermetalic / PVD coating" composite layers can be an effective solution to increase the abrasive wear resistance of magnesium alloys, it is not a good solution to increase its corrosion resistance.Keywords: magnesium alloys, composite layers, electron beam evaporation Stopy magnezu charakteryzują się bardzo interesującymi właściwościami fizycznymi które powodują że, są one określane mianem materiałów przyszłości dla narzędzi oraz elementów maszyn stosowanych w wielu obszarach gospodarki. Ze względu na bardzo niską odporność korozyjną oraz tribologiczną występują trudności we wdrażaniu stopów magnezu do przemysłu. Jedną z metod poprawy właściwości stopów magnezu jest zastosowanie nowoczesnych rozwiązań inżynierii powierzchni. W artykule autorzy porównali tribologiczne oraz korozyjne właściwości dwóch różnych konfiguracji warstw kompozytowych typu "MgAl itermetalic / powłoka PVD" otrzymanych dwoma różnymi metodami hybrydowej obróbki powierzchniowej. W pierwszej konfiguracji warstwa kompozytowa "MgAl itermetalic / powłoka PVD" została otrzymana z wykorzystaniem wieloźródłowej hybrydowej technologii obróbki powierzchniowej, obejmującej połączenie rozpylania magnetronowego (MS), odparowania łukiem elektrycznym (AE) oraz próżniowej obróbki cieplnej. Drugi rodzaj warstwy kompozytowej został otrzymany z wykorzystaniem technologii hybrydowej łączącej proces dyfuzji w proszku aluminium z metodą odparowania wiązką elektronów (EB). Wykazano, że wytwarzanie warstw kompozytowych typu "MgAl itermetalic / powłoka PVD" na stopach magnezu jest efektywnym rozwiązaniem w celu zwiększenia odporności na zużycie ścierne, jednakże nie zapewnia wymaganego zwiększenia odporności korozyjnej tych stopów.

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Lower temperature fabrication of continuous intermetallic coatings on AZ91D magnesium alloy in molten salts

Cited by 39 publications

References 19 publications

Protective diffusion coatings on magnesium alloys: A review of recent developments

Protective diffusion coatings on magnesium alloys: A review of recent developments

Formation of Al-alloyed Layer on Magnesium with Use of Casting Techniques

Composite Layers “MgAl Intermetalic Layer / PVD Coating” Obtained On The AZ91D Magnesium Alloy By Different Hybrid Surface Treatment Methods

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