Microstructures and tribological properties of laser cladded Ti-based metallic glass composite coatings

Journal Article · Sat Oct 15 04:00:00 EDT 2016 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2016.08.026· OSTI ID:22689626

Lan, Xiaodong; Wu, Hong; Liu, Yong; Zhang, Weidong; Li, Ruidi; Chen, Shiqi; Zai, Xiongfei; Hu, Te

Metallic glass composite coatings Ti{sub 45}Cu{sub 41}Ni{sub 9}Zr{sub 5} and Ti{sub 45}Cu{sub 41}Ni{sub 6}Zr{sub 5}Sn{sub 3} (at.%) on a Ti-30Nb-5Ta-7Zr (wt.%) (TNTZ) alloy were prepared by laser cladding. The microstructures of the coatings were characterized by means of X-ray diffractometry (XRD), scanning electron microscopy (SEM) equipped with energy dispersive X-ray analyzer (EDXA), and transmission electron microscopy (TEM). Results indicated that the coatings have an amorphous structure embedded with a few nanocrystalline phases and dendrites. A partial substitution of Ni by Sn can improve the glass forming ability of Ti-base metallic glass system, and induce the formation of nano-sized Ni{sub 2}SnTi phase during the cyclic laser heating. The tribological behavior of both the substrate and the coatings was investigated in detail. A significant improvement in both the hardness and the wear resistance of the coatings was achieved with the addition of Sn. The relationship between the wear resistance and the microstructures of the coatings was discussed. - Highlights: •Ti-based metallic glass composite coatings were prepared by laser cladding. •The wear resistance is greatly improved by laser cladding of composite coatings. •Substitution of Ni by Sn increases GFA and wear resistance of the coatings. •A good balance of crystalline/amorphous phases improves the wear resistance. •Adhesive wear serves as the dominant wear mechanism of the composite coatings.

• OSTI ID: 22689626
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 120; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESIVES
AMORPHOUS STATE
CLADDING
COATINGS
DENDRITES
HARDNESS
LASER-RADIATION HEATING
LASERS
METALLIC GLASSES
MICROSTRUCTURE
NANOSTRUCTURES
NICKEL ADDITIONS
SCANNING ELECTRON MICROSCOPY
TIN ADDITIONS
TITANIUM BASE ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
TRIBOLOGY
WEAR
WEAR RESISTANCE
X-RAY DIFFRACTION