Research Progress on Laser Cladding for High-Temperature Wear and Corrosion Resistant Transition Metal Silicides Composite Coatings

The cobalt aluminum silicides Co19Al45Si(10-x) (x = 0.13) and Co5Al14Si2 were synthesized in liquid aluminum and characterized by single-crystal X-ray diffraction. Co19Al45Si(10-x) (x = 0.13) crystallizes in the monoclinic space group C2/c with lattice parameters a = 19.991(2) A, b = 19.143(2) A, c = 12.8137(15) A, beta = 123.583(2) degrees. Co5Al14Si2 adopts the orthorhombic space group Pnma with cell parameters a = 13.8948(19) A, b = 23.039(3) A, c = 7.3397(10) A. Both structures are exceptionally complex with the Co2Si2 rhombus being a common building motif. The coordination environments of cobalt atoms resemble those of the transition metals in typical quasi-crystal approximants. Co5Al14Si2 shows oxidation resistance in air up to 1000 degrees C by forming a dense-packed Al2O3 layer on the surface of the crystal.

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Research Progress on Laser Cladding for High-Temperature Wear and Corrosion Resistant Transition Metal Silicides Composite Coatings

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Structurally Complex Cobalt Intermetallics Grown from Liquid Aluminum: Co₁₉Al₄₅Si₁₀_-_x (x = 0.13) and Co₅Al₁₄Si₂

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Research Progress on Laser Cladding for High-Temperature Wear and Corrosion Resistant Transition Metal Silicides Composite Coatings

Cited by 3 publications

References 0 publications

Microstructure and wear properties of laser clad Ti2Ni3Si/Ni3Ti multiphase intermetallic coatings

Microstructure and wear properties of laser clad Ti2Ni3Si/Ni3Ti multiphase intermetallic coatings

Dry sliding wear behavior of laser clad Mo2Ni3Si/NiSi metal silicide composite coatings

Structurally Complex Cobalt Intermetallics Grown from Liquid Aluminum: Co19Al45Si10-x (x = 0.13) and Co5Al14Si2

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Product

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Structurally Complex Cobalt Intermetallics Grown from Liquid Aluminum: Co₁₉Al₄₅Si₁₀_-_x (x = 0.13) and Co₅Al₁₄Si₂