Enhanced mechanical properties and corrosion resistance of a Mg–Zn–Ca bulk metallic glass composite by Fe particle addition

2013 ◽  
Vol 91 ◽  
pp. 311-314 ◽  
Author(s):  
Jingfeng Wang ◽  
Song Huang ◽  
Yiyun Wei ◽  
Shengfeng Guo ◽  
Pan Fusheng
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Composite ◽  
Mechanical Properties And Corrosion ◽  
Bulk Metallic Glass Composite ◽  
Particle Addition

scholarly journals Improved Mechanical Properties and Corrosion Resistance of Mg-Based Bulk Metallic Glass Composite by Coating with Zr-Based Metallic Glass Thin Film

Coatings ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1212
Author(s):  
Pei-Hua Tsai ◽  
Chung-I Lee ◽  
Sin-Mao Song ◽  
Yu-Chin Liao ◽  
Tsung-Hsiung Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Substrate Surface ◽  
Bending Test ◽  
Corrosion Behaviors ◽  
Lightweight Structure ◽  
Mechanical Properties And Corrosion

Mg-based bulk metallic glass (BMG) and its composite (BMGC) can be excellent candidates as lightweight structure materials, but lack of anti-corrosion ability may restrict their application. In order to enhance the natural weak point of Mg-based BMGC, a 200-nm thick Zr-based metallic glass thin film (MGTF) ((Zr53Cu30Ni9Al8)99.5Si0.5) was applied and its mechanical properties as well as its corrosion resistance were appraised. The results of a 3-point bending test revealed that the flexural strength of the Mg-based BMGC with 200-nm thick Zr-based MGTF coating can be greatly enhanced from 180 to 254 MPa. We propose that the Zr-based MGTF coating can help to cover any small defects of a substrate surface, provide a protecting layer to prevent stress concentration, and cease crack initiation from the specimen surface during bending tests. Moreover, the results of anti-corrosion behavior analysis revealed a similar trend between the Mg-based BMG, Mg-based BMGC, and Mg-based BMGC with Zr-based MGTF coating in 0.9 wt.% sodium chloride solution. The readings show a positive effect with the Zr-based MGTF coating. Therefore, the 200-nm thick Zr-based MGTF coating is a promising solution to provide protection for both mechanical and anti-corrosion behaviors of Mg-based BMGC and reinforce its capability as structure material in island environments.

Formation, microstructure, and mechanical properties of in situ Mg–Ni–(Gd,Nd) bulk metallic glass composite

2009 ◽  
Vol 24 (12) ◽  
pp. 3603-3610 ◽  
Author(s):  
Jian Yin ◽  
Guangyin Yuan ◽  
Zhenhua Chu ◽  
Jian Zhang ◽  
W.J. Ding
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Hexagonal Lattice ◽  
Shear Bands ◽  
Glassy Matrix ◽  
Glass Composite ◽  
Specific Strength ◽  
Periodic Arrays ◽  
Bulk Metallic Glass Composite

Based on a ternary Mg75Ni15Gd10 metallic glass former, a new Mg80Ni12Gd4Nd4 bulk metallic glass composite (BMGC) was developed by tailoring the compositions of Mg and rare earth (RE) elements. This BMGC displayed compressive ultimate strength over 900 MPa with a total strain to failure of 4.3% and specific strength of 3.12 × 105 Nm/kg. The improved mechanical properties were attributed to a “dual phases” structure consisting of Mg solid solution flakes and glassy matrix in the Mg80Ni12Gd4Nd4 BMGC. The homogeneously dispersed Mg phases reinforcement in the BMGC were characterized as a long period ordered structure (LPOS) with periodic arrays of six close-packed planes distorted from the ideal hexagonal lattice of 6H-type. The LPOS-Mg in the composite can act as a soft media to trap or interact with the unstable shear bands and contribute to plastic strain. The present study may provide a guideline for designing the Mg–TM–RE-based (TM: transition metals) BMGCs with “dual phases” structures.

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