ارزیابی میکروساختاری پوشش‌های YSZپاشش پلاسمایی
الموضوعات :
سید علی صادقی فدکی
1
(کارشناس ارشد، دانشگاه صنعتی مالک اشتر، تهران)
ضیاء والفی
2
(استادیار، دانشگاه صنعتی مالک اشتر، مجتمع مواد فلزی، تهران)
کریم زنگنه مدار
3
(دانشیار، دانشگاه صنعتی مالک اشتر، مجتمع مواد فلزی، تهران)
الکلمات المفتاحية: میکروساختار, تخلخل, ذرات پودری ذوب نشده, پاشش پلاسمایی, پوشش زیرکونیا,
ملخص المقالة :
در این تحقیق، پوشش‌های زیرکونیای پایدار شده با ایتریا توسط روش پاشش پلاسمای اتمسفری بر روی زیرلایه‌ای از جنس فولاد کربنی اعمال گردید. مشخصه‌های میکروساختاری پوشش با استفاده از میکروسکوپ الکترونی روبشی و نیز پردازش تصویر به کمک میکروسکوپ نوری تعیین گردید. همچنبن ارتباط میان مشخصه‌های کمی میکروساختار پوشش YSZ با پارامترهای پاشش پلاسمایی (فاصله پاشش و نرخ تزریق پودر) مشخص گردید. نتایج حاکی از این است که با تغییر فاصله پاشش و نرخ تزریق پودر، میزان تخلخل، مورفولوژی تخلخل و درصد ذرات پودری ذوب نشده در میکروساختار تغییر می‌یابد. بعلاوه، نتایج نشان داد تاثیر نرخ تزریق پودر بر مشخصه‌های میکروساختاری نسبت به فاصله پاشش بیشتر می‌باشد.
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