کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10675521 1010686 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Medieval silver coins of India: Composition and authentication
ترجمه فارسی عنوان
سکه نقره ای قرون وسطی هند: ترکیب و احراز هویت
کلمات کلیدی
سکه نقره ای، آمالگام، ضعف فاز سرب، سخت شدن سن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
چکیده انگلیسی
The discrimination of medieval silver coins into genuine and forged have been performed using WD-XRF and cross-sectional analysis by SEM-EDX. The study conclusively shows that forged coin was manufactured by plating silver over baser metal alloy of copper and lead that caused segregation and brittleness owing to their reduced solid solubility. Silver was alloyed with a small percentage of copper or sometimes with copper and lead in original coins leading to age-hardening embrittlement in the ternary silver-copper-lead system on cooling. The presence of zinc and tin in some analyzed coins indicate copper was added as an alloy. All the coins were gold amalgamated with the help of mercury on either surface observed through WD-XRF. The silver/copper ratio indicates more than one mint. Preferential mineralization of more chemically active phase occurred as isolated patina shows the presence of oxides of lead, copper, silver, magnesium, and silica through XRD analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 436, 1 December 2018, Pages 163-172
نویسندگان
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