تأثير البلاتين على عملية الانتشار المتبادل في الخلائط ذات الأساس " تيتان – ذهب "
Abstract
Rutherford Backscattering used is a method to study the surface composition of the compound ( between ) in depth. The energy analysis of the scattered particles due to collision with the target, will allow us to differentiate between the mass M of that target and its density inside it.
Interdiffusion in the systems is measured using Rutherford backscattering. Extensive grain size measurements are used to interpret the data in terms of grain-boundary-assisted bulk diffusion. At room temperature, rapid grain-boundary diffusion of Au into the fine-grained Pt layer of the Ti-Pt-Au films occurs, characterized by a diffusion coefficient. The bulk diffusion of Au into the grains of the Pt film layer is examined. It is found that interdiffusion in Ti-Pt couple is much slower than in Ti-Au.
إن طريقة RBS هي طريقة تحليلية لسبر المناطق القريبة من السطح (من x=0 إلى بضعة ميكرونات عمقاً). إن التحليل الطاقي للجزيئات المرتدة عن التصادم مع ذرات الهدف(العينة) تسمح بتمييز الكتلM لذرات الهدف ، ووضعها داخل الجزيئة وتركيزها.تمت دراسة الانتشار المتبادل في الأفلام الرقيقة من النوع Ti/Pt/Au باستخدام طريقة الاستطارة الخلفية لرذرفورد. لقد استخدم قياس حجم الحبيبات, وذلك بغية شرح المعطيات على شكل انتشار الحبيبات في منطقة الحدود في الجملة.
ففي درجات الحرارة العادية، تم وصف الانتشار السريع لحبيبات الذهب المجاورة لدقيق حبيبات البلاتين في أفلام Ti/Pt/Au ، بمعامل الانتشار . تمت في الجملة عملية فحص انتشار الذهب في حبيبات البلاتين. لقد تبين أن عملية الانتشار المتبادل في الأفلام الزوجية لـ Ti/Pt هي أكثر بطأً منها في الأفلام الزوجية لـ Ti/Au.
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