Effect of mold temperature on the microstructure and corrosion properties of a 14-karat gold alloy
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- KOISO Kazuo
- Department of Dentistry for Geriatric and Medically Compromised Patient, Graduate School of Dentistry, Ohu University
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- SAITO Takahiro
- Department of Therapeutic Science, School of Dentistry, Ohu University
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- KAWASHIMA Isao
- Department of Dental Materials Science, School of Dentistry, Ohu University
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The objective of this research was to investigate the effect of mold temperature on grain interior and grain boundary reactions in a14-karat gold alloy. The alloy (Au-15%Ag-3%Pd-24 mass%Cu) was cast into an investment with different mold temperatures (22, 250,400, and 700°C) and then analyzed using SEM, X-ray diffraction, and potentiodynamic polarization tests. Lower mold temperatures(22 and 250°C) retarded a grain boundary reaction evidently present when using higher mold temperatures (400 and 700°C). Phase separation, which was manifested as a dual phase grain boundary nodular formation, was observed at a higher degree at 400°C mold temperature than at 700°C. The corrosion potentials of alloys cast at lower mold temperatures were more noble than those cast at higher mold temperatures, suggesting improved corrosion properties. Results of this study showed that the microstructure, crystalline phases present, and corrosion properties of 14-karat gold alloy were keenly influenced by the mold temperature, which controls and influences the cooling rate.
収録刊行物
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- Dental Materials Journal
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Dental Materials Journal 31 (4), 669-673, 2012
一般社団法人 日本歯科理工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204716077824
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- NII論文ID
- 10030501878
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- NII書誌ID
- AA10443149
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- COI
- 1:STN:280:DC%2BC38flsFKnsQ%3D%3D
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- ISSN
- 18811361
- 02874547
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- PubMed
- 22864223
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可