تولید، مشخصه‌یابی ساختاری و ارزیابی خواص مغناطیسی پوشش‌های نانوساختار آهن- کبالت- تنگستن تهیه شده به روش آبکاری الکتریکی

الموضوعات : فصلنامه علمی - پژوهشی مواد نوین

زهرا غافری ¹ (دانشجوی دکترای مهندسی مواد دانشگاه شهید باهنر کرمان)
شهریار شرفی ² (استاد بخش مهندسی مواد دانشگاه شهید باهنر کرمان)
محمد ابراهیم بحرالعلوم ³ (استاد بخش مهندسی مواد دانشگاه شیراز)

تاريخ الإرسال : 08 الأحد , محرم, 1438 تاريخ التأكيد : 08 الأحد , محرم, 1438 تاريخ الإصدار : 21 الخميس , ذو الحجة, 1437

الکلمات المفتاحية: نانوساختار, آبکاری الکتریکی, خاصیت مغناطیسی, آهن-کبالت-تنگستن,

ملخص المقالة :

در این تحقیق پوشش­های نانوساختار آهن-کبالت-تنگستن به روش آبکاری جریان مستقیم بر روی زیر لایه مسی حاصل شد. نتایج نشان داد که چگالی جریان پوشش­دهی و نیز ترکیب شیمیایی محلول بر خواص مغناطیسی و ساختاری اثرگذار است. مورفولوژی پوشش­های بدست آمده از دو حمام آبکاری متفاوت بوده و با افزایش چگالی جریان آبکاری مقدار فاز fcc موجود در ساختار دو فازی fcc+bcc کاهش یافت. مشاهده شد که پارامترهای آبکاری تاثیر چشمگیری بر روی تغییرات اندازه دانه نداشته و اندازه دانه پوشش­ها کمتر از 20 نانومتر گزارش شد. با افزایش چگالی جریان، رسوب­دهی تحت کنترل نفوذ درآمده و مقدار تنگستن رسوب­کرده و در نتیجه میکروسختی پوشش­ها کاهش یافت. با توجه به نتایج حاصل از پراش پرتو ایکس (XRD) و نیز مغناطش سنج نمونه لرزان  (VSM)می­توان تغییرات گسترده در مقدار وادارندگی را به تغییرات فازی در این پوشش­ها مربوط دانست.

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