Academic Journal
Phase transitions of silver and silver–palladium alloys immersed in mercury
| العنوان: | Phase transitions of silver and silver–palladium alloys immersed in mercury |
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| المؤلفون: | CHERN LIN, J. H., YUAN, J. Y., HO, W. F., JU, C. P. |
| المصدر: | Journal of Oral Rehabilitation ; volume 34, issue 5, page 383-388 ; ISSN 0305-182X 1365-2842 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2007 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | summary A series of Ag–Hg and Ag–Pd–Hg phases have been prepared by immersion in mercury and subsequent heat treatment of pure Ag and a series of Ag–Pd alloys. Phase transitions, along with the changes involved in morphology and chemistry, are investigated. Experimental results indicate that when mercury‐immersed Ag discs are heat‐treated at 90 °C for 12 h, large (>50 μm) crystals with Ag/Hg atomic ratios close to those of stoichiometric AgHg 2 form on the Ag surface. Heat treatment for 36 h causes these crystals to disintegrate into smaller (majority <10 μm) Ag 2 Hg 3 (γ 1 ) crystals. After 60 h, the stoichiometric γ 1 crystals further breakdown into even smaller stoichiometric AgHg( β 1 ) crystals. The oft‐referenced β 1 phase Ag 1·1 Hg 0·9 is not supported in the present study. Addition of Pd to Ag has a dramatic effect on the morphology of the γ 1 phase. With more addition of Pd, large‐faceted and elongated γ 1 crystals tend to grow in the midst of smaller matrix γ 1 crystals. All three different Pd‐containing crystals have (Ag + Pd)/Hg ratios very close to those of the stoichiometric γ 1 phase, indicating that added Pd tends to replace Ag, rather than Hg, in the γ 1 phase. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1111/j.1365-2842.2007.01202.x |
| الاتاحة: | http://dx.doi.org/10.1111/j.1365-2842.2007.01202.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2842.2007.01202.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2842.2007.01202.x |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.2DA264B1 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1111/j.1365-2842.2007.01202.x |
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