The mechanism of pore formation in superconducting MgB2 synthesized at low temperature by in-situ process

Yifang Wu; Guo Yan; Shicheng Yan; Chengshan Li; Jinshan Li; Yafeng Lu

The mechanism of pore formation in superconducting MgB₂ synthesized at low temperature by in-situ process

Yifang Wu, Guo Yan, Shicheng Yan, Chengshan Li, Jinshan Li, Yafeng Lu

School of Materials Sience and Engineering

Northwest Institute for Nonferrous Metal Research

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

Abstract

Using X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) the mechanism of pore formation of superconducting MgB₂ synthesized at low temperature by in-situ process was studied. It is showed that B powder was embedded into Mg powder after the ball-milling process. MgB₂ phase formed firstly in these embedded areas. The closed pores in MgB₂ bulks are caused by kirkendall effect due to the different diffusion speeds of Mg and B atoms. The open pores are caused by Mg gas.

Original language	English
Pages (from-to)	647-650
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	38
Issue number	4
State	Published - Apr 2009

Keywords

Ball milling
MgB
Pore
Superconductor

Cite this

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title = "The mechanism of pore formation in superconducting MgB2 synthesized at low temperature by in-situ process",

abstract = "Using X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) the mechanism of pore formation of superconducting MgB2 synthesized at low temperature by in-situ process was studied. It is showed that B powder was embedded into Mg powder after the ball-milling process. MgB2 phase formed firstly in these embedded areas. The closed pores in MgB2 bulks are caused by kirkendall effect due to the different diffusion speeds of Mg and B atoms. The open pores are caused by Mg gas.",

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author = "Yifang Wu and Guo Yan and Shicheng Yan and Chengshan Li and Jinshan Li and Yafeng Lu",

year = "2009",

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language = "英语",

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T1 - The mechanism of pore formation in superconducting MgB2 synthesized at low temperature by in-situ process

AU - Wu, Yifang

AU - Yan, Guo

AU - Yan, Shicheng

AU - Li, Chengshan

AU - Li, Jinshan

AU - Lu, Yafeng

PY - 2009/4

Y1 - 2009/4

N2 - Using X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) the mechanism of pore formation of superconducting MgB2 synthesized at low temperature by in-situ process was studied. It is showed that B powder was embedded into Mg powder after the ball-milling process. MgB2 phase formed firstly in these embedded areas. The closed pores in MgB2 bulks are caused by kirkendall effect due to the different diffusion speeds of Mg and B atoms. The open pores are caused by Mg gas.

AB - Using X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) the mechanism of pore formation of superconducting MgB2 synthesized at low temperature by in-situ process was studied. It is showed that B powder was embedded into Mg powder after the ball-milling process. MgB2 phase formed firstly in these embedded areas. The closed pores in MgB2 bulks are caused by kirkendall effect due to the different diffusion speeds of Mg and B atoms. The open pores are caused by Mg gas.

KW - Ball milling

KW - MgB

KW - Pore

KW - Superconductor

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M3 - 文章

AN - SCOPUS:65749083689

SN - 1002-185X

VL - 38

SP - 647

EP - 650

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 4

ER -

The mechanism of pore formation in superconducting MgB₂ synthesized at low temperature by in-situ process

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Keywords

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