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Register a new userThe Effect of Aluminum Powder on the Wear Rate and Mechanisms of Unsaturated Thermosetting Polyester Resin
تأثير بودرة الألمنيوم على نسبة و أنماط التآكل في مركبات البولي إستر المتصلب حرارياً غير المشبع
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هندية عفيصة( باحث )
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يدرس البحث تأثير بودرة الألمنيوم كمادة إضافة لراتنج البولي إستر غير المشبع المتصلب حرارياً (UPR) على نسبة التآكل بالنسبة للزمن و على تغير نمط التآكل. بينت النتائج أن نسبة التآكل تزداد مع زيادة زمن الاختبار نتيجة زيادة درجة حرارة الاحتكاك بمرور الزمن و ذلك لجميع العينات النقية و الحاوية على بودرة الألمنيوم، و لكن عند إضافة بودرة الألمنيوم إلى البولي إستر نلاحظ انخفاض نسبة التآكل مقارنة بالحالة النقية و يزداد هذا الانخفاض مع زيادة نسبة المادة المالئة، أي تزداد مقاومة مادة UPR للتآكل عند زيادة نسبة بودرة الألمنيوم نتيجة زيادة الموصلية الحرارية مما يؤدي إلى انخفاض الحرارة عند سطوح التماس مؤدياً في النهاية إلى تآكل أقل. أما نمط التآكل الناتج بالفحص المجهري لسطح العينة المتآكل فقد كان يتغير من التآكل الالتصاقي عند القيم المنخفضة لزمن الاختبار و يصبح تآكلاً حاتاً (3-body) عند الأزمنة المرتفعة للاختبار من دون الوصول إلى مرحلة الانهيار في كل مراحل الاختبار و مع اختلاف المادة المختبرة.
This experiment investigates the effect of aluminum powder as metallic filler of unsaturated thermosetting polyester resin on the wear rate and its mechanisms according to time. The obtained results show that the rate of wear increases with increase of time as a result of increase the temperature generated of friction in all specimens. But when we add the particles either Aluminum to polyester matrix, the rate of wear reduce as a result of increase the thermal conductivity of polyester matrix, that leads reduction of the temperature of contact surface, that leads less wear. We study the mechanisms of wear by microscope of the worn surface. It found that the predominant mechanisms of wear vary from adhesive wear at the lowest value of test time to abrasive wear (3- body) at the highest value of test time.
References used
RICHARD, M. O. W. Polymer Engineering Composites. applied science publishers LTD, London, 1992
PAULE GAEMO, E.; TEMPLE BLACK, J.; KOHSER, R. A. .Material and Processes in Manufacturing. Macmillan Publishing Company, New York, 1990
LAN- HUI SUN; ZHEN- GUO YANG; XIAO-HUI LI. Tensile and Tribological Properties of PTFE and Nanoparticles Modified Epoxy- Based Polyester Fabric Composites. Materials Science and Engineering: A, 497 (2008) 487-494
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