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

Na Chen; Ke Fu Yao; Fang Ruan; Yi Qiang Yang

doi:10.1016/j.msea.2007.03.094

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

Na Chen, Ke Fu Yao, Fang Ruan, Yi Qiang Yang

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The influence of cooling rate on the hardness of the as-prepared Pd₈₁Si₁₉ binary glassy alloys has been studied. It has been found that decreasing the employed cooling rate would increase the hardness and decrease the full width at half maximum (FWHM) of their X-ray diffractometry (XRD) spectrum. The microhardness of the bulk glassy alloy prepared by air cooling is about 453.9 kg/mm², 41% higher than that of the rapid solidified glassy ribbons. Through careful investigation of the FWHM of the XRD spectrum and the high resolution transmission electron microscope images, the cooling rate dependence of hardness is suggested to be attributed to the difference in structural uniformity and the resulted local ordering atomic clusters (medium-range order (MRO) regions) within the as-prepared glassy samples. Moreover, it has been found that decreasing cooling rate would promote the formation of denser atomic configuration and the local ordering clusters (MRO).

Original language	English
Pages (from-to)	274-278
Number of pages	5
Journal	Materials Science and Engineering A
Volume	473
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.03.094
Publication status	Published - 2008 Jan 25

Keywords

Cooling rate
Hardness
Metallic glass
Microstructure

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2007.03.094

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title = "The influence of cooling rate on the hardness of Pd-Si binary glassy alloys",

abstract = "The influence of cooling rate on the hardness of the as-prepared Pd81Si19 binary glassy alloys has been studied. It has been found that decreasing the employed cooling rate would increase the hardness and decrease the full width at half maximum (FWHM) of their X-ray diffractometry (XRD) spectrum. The microhardness of the bulk glassy alloy prepared by air cooling is about 453.9 kg/mm2, 41% higher than that of the rapid solidified glassy ribbons. Through careful investigation of the FWHM of the XRD spectrum and the high resolution transmission electron microscope images, the cooling rate dependence of hardness is suggested to be attributed to the difference in structural uniformity and the resulted local ordering atomic clusters (medium-range order (MRO) regions) within the as-prepared glassy samples. Moreover, it has been found that decreasing cooling rate would promote the formation of denser atomic configuration and the local ordering clusters (MRO).",

keywords = "Cooling rate, Hardness, Metallic glass, Microstructure",

author = "Na Chen and Yao, {Ke Fu} and Fang Ruan and Yang, {Yi Qiang}",

note = "Funding Information: This work was supported by The Natural Science Foundation of China (Grant No. 50431030), the Basic Science Research Foundation of Tsinghua University (Grant No. 091201107) and the National Center for Nanoscience and Technology of China.",

year = "2008",

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doi = "10.1016/j.msea.2007.03.094",

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AU - Chen, Na

AU - Yao, Ke Fu

AU - Ruan, Fang

AU - Yang, Yi Qiang

N1 - Funding Information: This work was supported by The Natural Science Foundation of China (Grant No. 50431030), the Basic Science Research Foundation of Tsinghua University (Grant No. 091201107) and the National Center for Nanoscience and Technology of China.

PY - 2008/1/25

Y1 - 2008/1/25

N2 - The influence of cooling rate on the hardness of the as-prepared Pd81Si19 binary glassy alloys has been studied. It has been found that decreasing the employed cooling rate would increase the hardness and decrease the full width at half maximum (FWHM) of their X-ray diffractometry (XRD) spectrum. The microhardness of the bulk glassy alloy prepared by air cooling is about 453.9 kg/mm2, 41% higher than that of the rapid solidified glassy ribbons. Through careful investigation of the FWHM of the XRD spectrum and the high resolution transmission electron microscope images, the cooling rate dependence of hardness is suggested to be attributed to the difference in structural uniformity and the resulted local ordering atomic clusters (medium-range order (MRO) regions) within the as-prepared glassy samples. Moreover, it has been found that decreasing cooling rate would promote the formation of denser atomic configuration and the local ordering clusters (MRO).

AB - The influence of cooling rate on the hardness of the as-prepared Pd81Si19 binary glassy alloys has been studied. It has been found that decreasing the employed cooling rate would increase the hardness and decrease the full width at half maximum (FWHM) of their X-ray diffractometry (XRD) spectrum. The microhardness of the bulk glassy alloy prepared by air cooling is about 453.9 kg/mm2, 41% higher than that of the rapid solidified glassy ribbons. Through careful investigation of the FWHM of the XRD spectrum and the high resolution transmission electron microscope images, the cooling rate dependence of hardness is suggested to be attributed to the difference in structural uniformity and the resulted local ordering atomic clusters (medium-range order (MRO) regions) within the as-prepared glassy samples. Moreover, it has been found that decreasing cooling rate would promote the formation of denser atomic configuration and the local ordering clusters (MRO).

KW - Cooling rate

KW - Hardness

KW - Metallic glass

KW - Microstructure

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

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Keywords

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