Causes of cracks in laser welded cobalt-chromium alloys for dental use
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概要
- 論文の詳細を見る
In order to determine the cause of cracks in laser welded cobalt-chromium alloys for dental use, we analyzed the concentrations of various elements in the fracture surface of the weld that are thought to cause eutectics and to increase crack sensitivity. In addition, we examined crystallographic changes produced by laser welding using the X-ray diffraction method. We concluded that silicon and sulfur contained in the alloy are the primary causes of solidification cracks. Moreover, solidification cracking might be generated by aluminum, calcium and carbon. The laser weld of cast cobalt-chromium alloy for casting displayed a face-centered cubic structure, whereas the base metal had a hexagonal close-packed structure. No relationship was found between changes in structure and crack generation.
- 大阪歯科学会の論文
著者
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Okazaki Joji
Department of Removable Prosthodontics and Occlusion, Osaka Dental University
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Komasa Yutaka
Department of Geriatric Dentistry, Osaka Dental University
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KAKIMOTO Kazutoshi
Department of Geriatric Dentistry, Osaka Dental University
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Kakimoto Kazutoshi
大阪歯科大学 生化学
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Koishi Atsufusa
Department of Geriatric Dentistry, Osaka Dental University
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Kinoshita Madoka
Department of Geriatric Dentistry, Osaka Dental University
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Kinoshita Madoka
Department Of Geriatric Dentistry Osaka Dental University
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Kakimoto Kazutoshi
Osaka Dental Univ. Osaka Jpn
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Kakimoto K
Osaka Dental Univ. Osaka Jpn
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Koishi Atsufusa
Department Of Geriatric Dentistry Osaka Dental University
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Okazaki J
Department Of Removable Prosthodontics And Occlusion Osaka Dental University
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Komasa Y
Graduate School Of Dentistry (geriatric Dentistry) Osaka Dental University
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Okazaki Joji
Department Of Geriatric Dentistry Osaka Dental University
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Komasa Yutaka
Department Of Geriatric Dentistry Graduate School Of Geriatric Dentistry Osaka Dental University
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Kakimoto Kazutoshi
Department Of Geriatric Dentistry Graduate School Of Geriatric Dentistry Osaka Dental University
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Komasa Yutaka
Department of Geriatric Dentistry , Osaka Dental University
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