The influence of cooling rate on the hardness of Pd–Si binary glassy alloys

Chen, Na; Yao, K.; Ruan, Fangming; Yang, Yi

doi:10.1016/j.msea.2007.03.094

Cited by 19 publications

(8 citation statements)

References 24 publications

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“…According to the three famous empirical rules proposed by Inoue [8], the GFA of metallic glasses could be improved by choosing appropriate compositions. However, experiments indicate that many physical and mechanical properties are very sensitive to the cooling rate during fabrication [9][10][11][12][13][14]. Obviously, the cooling rate restricts the atomic rearrangement during the glass formation process and affects the properties of BMGs further.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Rate on Microstructure and Mechanical Properties of Zr-Based Bulk Metallic Glasses

Sun

Zhang

2013

Advances in Materials Science and Engineering

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The aim of the present study is to shed some insights on the effect of cooling rate on the microstructure and mechanical properties for glass-forming alloys. A crystalline gradient was observed in the microstructure of 12 mm diameter Zr51Al9.96Ni14.34Cu24.9(Zr51) alloy sample from the edge to center due to uneven cooling rates. Microhardness results indicate that the lower the cooling rate, the higher the hardness for the studied alloy.

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Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Rate on Microstructure and Mechanical Properties of Zr-Based Bulk Metallic Glasses

Sun

Zhang

2013

Advances in Materials Science and Engineering

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“…The thermal stability of alloy melt was remarkably improved and the propensity to crystallization was depressed, resulting in the enhancement of undercooling. As a result, the critical cooling rate was largely reduced and the glass forming ability was greatly improved [26][27][28] . So Pd-Si binary bulk metallic glass can be produced at a very low cooling rate.…”

Section: Resultsmentioning

confidence: 99%

Pd-Si binary bulk metallic glass

Yao

Chen

2008

Sci. China Ser. G-Phys. Mech. As

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Pd 80+x Si 20−x (x = 0, 1, and 2) binary metallic glasses with the diameter ranging from 7 to 8 mm were prepared by a combination of fluxing and water quenching or air cooling. Thermal analysis results show that with increasing Si content, the glass transition temperature T g , the initial crystallization temperature T x and the onset crystallization temperature T p of Pd-Si binary glassy alloys increase. Moreover, the supercooled liquid region reaches 61 K. It indicates that Pd-Si binary alloys possess large glass forming ability, which can be greatly improved by fluxing treatment.fluxing, bulk metallic glass, binary alloys, glass forming ability, undercooled liquid Since the first glassy alloy was reported, extensive research has been carried out [1][2][3] . Amorphous alloy has great potentials for application due to its excellent properties such as high corrosion resistance, low elastic modulus and high strength. However, most of amorphous alloys were prepared in shape of ribbons, thin films or powders by rapid solidification methods (>1×10 6 K/s), which greatly limits their application. So it is very meaningful to develop bulk metallic glasses with three-dimensional size over millimeter. Recently, bulk metallic glasses, such as Pd-Ni-P, Al-La-Ni, Mg-Cu-Y, Mg-Ni-Y, Zr-Al-Ni alloy systems [4][5][6][7][8][9] , were successfully prepared at low cooling rate less than 1000 K/s, which promotes the research and application of amorphous alloys. Furthermore, Inoue proposed three empirical rules for designing and developing bulk metallic glasses based on the obtained experimental results: 1) multi component systems consisting of more than three elements; 2) significant difference in atomic size ratios above about 12% among the three main constituent elements; 3) negative heats of mixing among the three main constituent elements [8,9] . These empirical rules show that the more constituent elements the more difficultly atoms diffuse during the cooling process, and thus the nucleation and crystallization can be depressed, resulting in the increase in the undercooling of alloy melt and the improvement of the glass forming ability. According to these empirical rules, a lot of multicomponent bulk metallic glasses were developed [9][10][11] . The multicomponents, however, greatly complicate the research on glass forming ability, glass transition and computer simulation. Therefore, it becomes important to develop binary bulk

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“…Thus, annealing creates a glass structure that is relatively more starved of free volume and is less deformable. Conversely, quenching more quickly from the melt creates a softer, less‐dense BMG structure with higher free volume and higher ductility (Figure ) …”

Section: Deformation Response Of Bulk Metallic Glassesmentioning

confidence: 99%

Bulk Metallic Glasses as Structural Materials: A Review

Kruzic

2016

Adv Eng Mater

232

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Bulk metallic glasses (BMGs) can exhibit excellent combinations of strength and fracture toughness that cannot be achieved by traditional metals, making them attractive for load bearing, mechanical engineering applications. Furthermore, recent research on BMGs has shown that many early perceived shortcomings, such as apparent brittleness or poor fatigue resistance, are not as big of a problem as once thought. The purpose of this paper is to review some of the unique mechanical characteristics of BMGs along with some of the strategies that may be used to improve or exploit their characteristics so that BMGs may be used as structural materials in engineering applications.

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The influence of cooling rate on the hardness of Pd–Si binary glassy alloys

Cited by 19 publications

References 24 publications

The Effect of Cooling Rate on Microstructure and Mechanical Properties of Zr-Based Bulk Metallic Glasses

The Effect of Cooling Rate on Microstructure and Mechanical Properties of Zr-Based Bulk Metallic Glasses

Pd-Si binary bulk metallic glass

Bulk Metallic Glasses as Structural Materials: A Review

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