Solid State Synthesis of Mg₂Si/MgO Composites from an Elemental Mixture Powder of Magnesium and Rice Husk Silica

Umeda, Junko; Kondoh, Katsuyoshi; Kawakami, Masashi; Imai, Hisashi

doi:https://doi.org/10.18910/4713

このアイテムのアクセス数:101件（2022-12-08 15:12 集計）

このアイテムへのリンクには次のURLをご利用ください: https://doi.org/10.18910/4713

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論文情報

タイトル	Solid State Synthesis of Mg₂Si/MgO Composites from an Elemental Mixture Powder of Magnesium and Rice Husk Silica
著者	NRID 1000050345162 1000050345162 著者名 Umeda, Junko
	NRID 1000050345138 1000050345138 著者名 Kondoh, Katsuyoshi
	著者名 Kawakami, Masashi
	NRID 1000030452379 1000030452379 著者名 Imai, Hisashi
キーワード等	Rice Husk Silica
	Magnesium
	Mg₂Si Solid State Reaction
	Amorphous
抄録	The utilization of silica particles originating in rice husks as reinforcements for magnesium is discussed. The reactivity of magnesium with silica particles in the solid state to synthesize magnesium silicide (Mg₂Si) was investigated by DTA and XRD analysis. Finer silica particles were more effective for reacting with magnesium at low temperature due to the increase of their surface area in contact with magnesium. Amorphous silica was more useful for the reaction than the crystalline form. The reactivity of rice husk silica was superior to that of the conventional mineral silica particles because of not only its amorphous structure but the larger specific surface area caused by the pore structures. In the case of a green compact of the elemental mixture of silica particles and Mg powder, the silica particle size was not effective on the reactivity because the coarse particles are fractured into fine ones by cold compaction at the applied pressure of 600 MPa. The distribution of Mg₂Si intermetallics in magnesium powder composites consolidated by the SPS process was investigated by XRD and SEM-EDS analysis. When the sintering temperature was over the exothermic temperature of the elemental mixtures of silica particles and Mg powder in the DTA profile, the synthesis of Mg₂Si occurs completely occurs during sintering. The density and hardness of their composites sintered over the ignition temperature of the DTA profile were remarkably high because of the good densification by the high reactivity and the distribution of Mg₂Si hard compounds.
出版者	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
収録物名	Transactions of JWRI
巻	37
号	1
開始ページ	113
終了ページ	117
刊行年月	2008-07
言語	英語
ハンドルURL	https://hdl.handle.net/11094/4713
DOI	https://doi.org/10.18910/4713
PISSN	03874508
NCID	AA00867058
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.37 No.1 (2008-07)

資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI.37(1) p.113-p.117
DC.title	Solid State Synthesis of Mg₂Si/MgO Composites from an Elemental Mixture Powder of Magnesium and Rice Husk Silica
DC.creator	Umeda, Junko
	Kondoh, Katsuyoshi
	Kawakami, Masashi
	Imai, Hisashi
DC.publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2008-07
DC.subject	Rice Husk Silica
	Magnesium
	Mg₂Si Solid State Reaction
	Amorphous
DCTERMS.abstract	The utilization of silica particles originating in rice husks as reinforcements for magnesium is discussed. The reactivity of magnesium with silica particles in the solid state to synthesize magnesium silicide (Mg₂Si) was investigated by DTA and XRD analysis. Finer silica particles were more effective for reacting with magnesium at low temperature due to the increase of their surface area in contact with magnesium. Amorphous silica was more useful for the reaction than the crystalline form. The reactivity of rice husk silica was superior to that of the conventional mineral silica particles because of not only its amorphous structure but the larger specific surface area caused by the pore structures. In the case of a green compact of the elemental mixture of silica particles and Mg powder, the silica particle size was not effective on the reactivity because the coarse particles are fractured into fine ones by cold compaction at the applied pressure of 600 MPa. The distribution of Mg₂Si intermetallics in magnesium powder composites consolidated by the SPS process was investigated by XRD and SEM-EDS analysis. When the sintering temperature was over the exothermic temperature of the elemental mixtures of silica particles and Mg powder in the DTA profile, the synthesis of Mg₂Si occurs completely occurs during sintering. The density and hardness of their composites sintered over the ignition temperature of the DTA profile were remarkably high because of the good densification by the high reactivity and the distribution of Mg₂Si hard compounds.
DC.identifier	10.18910/4713
DC.format	application/pdf
citation_doi	https://doi.org/10.18910/4713
citation_title	Solid State Synthesis of Mg₂Si/MgO Composites from an Elemental Mixture Powder of Magnesium and Rice Husk Silica
citation_author	Umeda, Junko
	Kondoh, Katsuyoshi
	Kawakami, Masashi
	Imai, Hisashi
citation_publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
citation_language	英語
citation_date	2008-07
citation_journal_title	Transactions of JWRI
citation_volume	37
citation_issue	1
citation_firstpage	113
citation_lastpage	117
citation_public_url	https://hdl.handle.net/11094/4713
citation_doi_detail	10.18910/4713

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