Abstract
In-situ metallic glass matrix composites (MGMCs) are a new kind of promising structural engineering material. In this study, a comprehensive study about the corrosion behavior of in-situ Ti46Zr20V12Cu5Be17 MGMCs versus their size was conducted. It is interesting to find that the large sample exhibits a more excellent corrosion resistance than the small sample in the 10% H2SO4 solution both in chemical and electrochemical tests at room temperature. Furthermore, the results obtained from X-ray photoelectron spectra (XPS) demonstrate that the quality of the passive film formed on the large-sized sample is indeed superior to the small-sized sample. Based on (scanning electron microscope) SEM observation, the possible mechanisms of the observed phenomenon have been discussed in the present study.
Highlights
Bulk metallic glasses (BMGs) have generated tremendous interest in scientific communities since their birth in 1977, mainly due to their superior mechanical and physical properties, such as good soft magnetization susceptibility, high strength, large elastic strain limit, and excellent corrosion resistance [1,2]
The structures of as-cast Ti46Zr20V12Cu5Be17 in-situ metallic glass matrix composites (MGMCs) rods were examined by XRD
The amorphous matrix of these composites can be identified by the broad and diffuse diffuse patterns obtained by the synchrotron high-energy XRD studies, which was published patterns obtained by the synchrotron high-energy XRD studies, which was published elsewhere [16]
Summary
Bulk metallic glasses (BMGs) have generated tremendous interest in scientific communities since their birth in 1977, mainly due to their superior mechanical and physical properties, such as good soft magnetization susceptibility, high strength, large elastic strain limit, and excellent corrosion resistance [1,2]. It is found that almost all BMGs exhibit a fast propagation of localized shear bands, causing an inhomogeneous plastic deformation and hereafter a disastrous structural failure [3]. Some efforts, such as the introduction of secondary phases into the matrix of BMGs, have been made to improve the tensile ductility and toughness of BMGs [4]. An attractive scheme called dendrite-reinforced metallic glass matrix composites (MGMCs) has been developed, involving a series of materials known as in-situ MGMCs [5,6] This scheme is considered a breakthrough because remarkable tensile plastic deformation at room-temperature has been observed in these MGMCs materials. As a new material preparation scheme, in-situ MGMCs is distinguished with its simple casting and high glass-forming ability of matrices
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