Solid-state Reaction of CaO Particles Dispersed in Powder Metallurgy Magnesium Composites

Fujita, Junji; Enami, Keitaro; Ohara, Masaki; Igarashi, Takanori; Kondoh, Katsuyoshi

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タイトル	Solid-state Reaction of CaO Particles Dispersed in Powder Metallurgy Magnesium Composites
著者	Fujita, Junji Fujita, Junji
	Enami, Keitaro Enami, Keitaro
	Ohara, Masaki Ohara, Masaki
	Igarashi, Takanori Igarashi, Takanori
	Kondoh, Katsuyoshi Kondoh, Katsuyoshi
キーワード等	Magnesium alloy
	Calcium oxide
	Bulk mechanical alloying
	AZ61B
抄録	Powder metallurgy magnesium composites reinforced with calcium oxides (CaO) were fabricated by using an equal channel angular bulk mechanical alloying process (ECABMA), using AZ series alloys (AZ31B, AZ61B, AZ91D) as the matrix material. In-situ formed compounds were investigated by XRD, DTA and SEM/EDS analysis. In the case of AZ61B added with CaO particles, the fabrication of Al₂2Ca and MgO occurred by reducing CaO during annealing the composite. Annealing treatment for longer time or at higher temperature is necessary for the reaction in the specimens with lower CaO content. For example, with 2.5 vol.% CaO added AZ61B, the Al₂Ca phase was synthesized by annealing at 550℃ for 1 hour or at 450℃ for 24 hours. Both kinds of Al atoms which exist in solid solution in α-Mg matrix at room temperature and which generated from the decomposition of Mg₁₇Al₁₂ phase (βphase) form Al₂Ca phase during annealing at elevated temperature.
公開者	大阪大学接合科学研究所
公開者の別表記	Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)	オオサカダイガクセツゴウカガクケンキュウジョ
掲載誌名	Transactions of JWRI
巻	38
号	1
開始ページ	31
終了ページ	35
刊行年月	2009-09
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/10279
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.38 No.1 (2009-09)

著者版フラグ	publisher
NII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.38(1) P.31-P.35
DC.title	Solid-state Reaction of CaO Particles Dispersed in Powder Metallurgy Magnesium Composites
DC.creator	Fujita, Junji
	Enami, Keitaro
	Ohara, Masaki
	Igarashi, Takanori
	Kondoh, Katsuyoshi
DC.publisher	大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2009-09
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/10279
DC.subject	Magnesium alloy
	Calcium oxide
	Bulk mechanical alloying
	AZ61B
DCTERMS.abstract	Powder metallurgy magnesium composites reinforced with calcium oxides (CaO) were fabricated by using an equal channel angular bulk mechanical alloying process (ECABMA), using AZ series alloys (AZ31B, AZ61B, AZ91D) as the matrix material. In-situ formed compounds were investigated by XRD, DTA and SEM/EDS analysis. In the case of AZ61B added with CaO particles, the fabrication of Al₂2Ca and MgO occurred by reducing CaO during annealing the composite. Annealing treatment for longer time or at higher temperature is necessary for the reaction in the specimens with lower CaO content. For example, with 2.5 vol.% CaO added AZ61B, the Al₂Ca phase was synthesized by annealing at 550℃ for 1 hour or at 450℃ for 24 hours. Both kinds of Al atoms which exist in solid solution in α-Mg matrix at room temperature and which generated from the decomposition of Mg₁₇Al₁₂ phase (βphase) form Al₂Ca phase during annealing at elevated temperature.
citation_title	Solid-state Reaction of CaO Particles Dispersed in Powder Metallurgy Magnesium Composites
citation_author	Fujita, Junji
	Enami, Keitaro
	Ohara, Masaki
	Igarashi, Takanori
	Kondoh, Katsuyoshi
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2009-09
citation_journal_title	Transactions of JWRI
citation_volume	38
citation_issue	1
citation_firstpage	31
citation_lastpage	35
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/10279
citation_keywords	Magnesium alloy
	Calcium oxide
	Bulk mechanical alloying
	AZ61B

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