کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455697 | 1514648 | 2017 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strengthening mechanism in graphene nanoplatelets reinforced aluminum composite fabricated through spark plasma sintering
ترجمه فارسی عنوان
ساز و کار تقویت کننده در نانولوله های گرافن تقویت شده از آلومینیوم کامپوزیت ساخته شده از طریق پیچ خوردگی پلاسما جرقه
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
Graphene nanoplatelets (GNP) reinforced aluminum matrix composites, with â¤5 wt% GNP content, were synthesized by spark plasma sintering (SPS). GNPs were found to withstand severe conditions of high pressure and temperature during processing. Strength of composite was observed to be depending on the content and uniform dispersion of GNP in aluminum matrix, as verified by scanning electron micrographs. X-ray diffraction analysis confirmed that no reaction products exist at Al-GNP interface in significant amount. Instrumented indentation studies revealed improvement in hardness by 21.4% with 1 wt% GNP. This is due to the presence of stronger reinforcement, which provides high resistance to matrix against deformation. Improvement in yield strength and tensile strength was 84.5% and 54.8%, respectively, with 1 wt% GNP reinforcement. Properties deteriorated at higher concentration due to agglomeration of GNP. Reinforcing effect of GNPs, in terms of strengthening of composite, is found to be dominated by Orowan strengthening mechanism. Pinning of grains boundaries by GNPs led to uniform grain size distribution in the composites structure. Overall, graphene reinforcement has offered 86% improvement in specific strength of aluminum matrix.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 695, 17 May 2017, Pages 20-28
Journal: Materials Science and Engineering: A - Volume 695, 17 May 2017, Pages 20-28
نویسندگان
Ankita Bisht, Mukul Srivastava, R. Manoj Kumar, Indranil Lahiri, Debrupa Lahiri,