بررسی اثر گرماژ پارچه کربن بر خواص مکانیکی و فرسایشی عایق کربنی با رزین اپوکسی نووالاک تقویت شده با ذرات سرامیکی ZrB2/SiCدر دمای 3000 درجه سانتی‌گراد | ||
| مکانیک سازه ها و شاره ها | ||
| دوره 14، شماره 5، آذر و دی 1403، صفحه 87-107 اصل مقاله (1.99 M) | ||
| نوع مقاله: مقاله مستقل | ||
| شناسه دیجیتال (DOI): 10.22044/jsfm.2025.14849.3879 | ||
| نویسندگان | ||
| مهدی پور جعفری کسمائی* 1؛ جعفر اسکندری جم2؛ محمدحسین علائی3؛ علی خلیفه سلطانی3 | ||
| 1دانشجوی دکترا، مهندسی مکانیک، دانشگاه صنعتی مالک اشتر ، تهران، ایران | ||
| 2استاد، مهندسی مکانیک، دانشگاه صنعتی مالک اشتر، تهران، ایران | ||
| 3دانشیار، مهندسی مکانیک، دانشگاه صنعتی مالک اشتر، تهران، ایران | ||
| چکیده | ||
| این تحقیق به بررسی عملکرد مکانیکی و مقاومت در برابر فرسایش و اکسیداسیون عایق مقاوم به دما و فشار بر پایه کربن-اپوکسی نووالاک 1179 تقویت شده با ذرات سرامیکی ZrB2/SiC با گرماژ مختلف می‌پردازد. هدف از این پژوهش، بررسی تأثیر گرماژ پارچه کربن بر عایق کربن اپوکسی نووالاک تقویت شده با ذرات سرامیکی ZrB2/SiC بر رفتار مکانیکی و فرسایشی عایق است. در گام اول سه نمونه شامل زمینه رزین اپوکسی نووالاک1179 با 60%SiC+40% ZrB2 با پارچه کربن 120، 200 و 600 گرمی به روش پرس گرم ساخته‌شد، سپس خواص مکانیکی و حرارتی (فرسایشی) نمونه های عایق با گرماژ مختلف پارچه با استفاده از آزمون‌های اکسی استیلن، خمش وکشش ارزیابی گردید. برای بررسی مورفولوژی سطح، ازانالیز عنصری توزیع انرژی اشعه ایکس (EDS)و میکروسکوپ الکترونی روبشی SEM و شناسایی فازهای موجود از انالیز فازی پراش اشعه ایکس (XRD) استفاده شده‌است. نتایج نشان داد که با افزایش میزان گرماژ پارچه خواص مکانیکی و مقاومت فرسایشی کامپوزیت بهبود پیدا کرد. بیشترین کاهش وزن و کاهش ضخامت به ترتیب در نمونه عایق با پارچه 600 گرمی و120 گرمی بود. همچنین نمونه عایق با پارچه 600 گرمی دارای کمترین دمای پشت عایق، زیر 150 درجه سانتی‌گراد بود. نمونه عایق با پارچه 600 گرمی دارای خواص مکانیکی بالاتری نسبت به سایر نمونه‌ها به میزان، 486.35 مگاپاسکال استحکام کششی و 677.18 مگاپاسکال استحکام خمشی بود. در نهایت بررسی های مورفولوژی نشان داد حضور ذرات ZrB2/SiC منجر به ایجاد فازهایی دیرگداز همچون ZrO2, SiO2 و ZrSIO4 که موجب افزایش مقاومت به فرسایش داغ کامپوزیتهای کربن اپوکسی نووالاک می‌گردد. | ||
| کلیدواژه‌ها | ||
| عایق؛ ذرات سرامیکی؛ گرماژ؛ مورفولوژی؛ خواص مکانیکی | ||
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سایر فایل های مرتبط با مقاله
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| مراجع | ||
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