In Situ Formation of Ti47Cu38Zr7.5Fe2.5Sn2Si1Nb2 Amorphous Coating by Laser Surface Remelting

Abstract

In previous studies, Ti-based bulk metallic glasses (BMGs) free from Ni and Be were developed as promising biomaterials. Corresponding amorphous coatings might have low elastic modulus, remarkable wear resistance, good corrosion resistance, and biocompatibility. However, the amorphous coatings obtained by the common methods (high velocity oxygen fuel, laser cladding, etc.) have cracks, micro-pores, and unfused particles. In this work, a Ti-based Ti47Cu38Zr7.5Fe2.5Sn2Si1Nb2 amorphous coating with a maximum thickness of about 100 μm was obtained by laser surface remelting (LSR). The in-situ formation makes the coating dense and strongly bonded. It exhibited better corrosion resistance than the matrix and its corrosion mechanism was discussed. The effects of LSR on the microstructural evolution of Ti-based prefabricated alloy sheets were investigated. The nano-hardness in the heat affected zone (HAZ) was markedly increased by 51%, meanwhile the elastic modulus of the amorphous coating was decreased by 18%. This demonstrated that LSR could be an effective method to manufacture the high-quality amorphous coating. The in-situ amorphous coating free from Ni and Be had a low modulus, which might be a potential corrosion-resistant biomaterial.

Research Progress and Development Trend of Amorphous and Nanocrystalline Composite Coatings: A Review

“…79 Therefore, amorphous alloys have better corrosion resistance than traditional metals. 80 Si et al 81 prepared FeMoCrCo amorphous coatings by subsonic flame spraying technology and compared the corrosion resistance with 316L substrate and other Fe-based amorphous coatings. The results showed that the corrosion potentials of FeMoCrCo, FeAAC, FeBCrMo, FeCrMoC and FeCrSiMo coatings were À 438, À 458, À 472, À 559 and À 664 mV, respectively.…”

Special Issue “Advanced Composites: From Materials Characterization to Structural Application”

“…The application of advanced manufacturing technologies is the research focus of articles [ 16 , 17 ]. Supersaturated Cu-Cr solid solution was formed in the reference [ 16 ] using the mechanical alloying method.…”

“…Extension of the high-energy milling procedure presents new insights in the field of research where many articles have been published in the past ten years. A prefabricated Ti-based alloy plate was processed in the study [ 17 ] using laser surface remelting technology to obtain an in situ, strongly binding amorphous coating. Dental implants and orthopedic prostheses are the common application objects of such alloys because of high corrosion resistance and good biocompatibility.…”