افزایش مقاومت به سایش زیرلایۀ مسی پوشش‌داده‌شده با نانوکامپوزیت مس‌آلومینا به‌روش احتراق محلولی

نوع مقاله : علمی و پژوهشی

نویسندگان

1 گروه مهندسی مواد، دانشکده مهندسی مکانیک و مواد، دانشگاه صنعتی بیرجند، بیرجند، ایران.

2 گروه مهندسی مواد و متالورژی، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران.

چکیده

یکی از روش‌های نوین برای سنتز سریع و کم‌هزینۀ نانومواد، سنتز احتراقی در محلول است. در کار ارائه‌شده از نیترات‌های‌‌ مس و آلومینیم با نقش اکسیدکنندگی و از اوره به‌عنوان سوخت و از گرافیت نیز برای مادۀ کمکی استفاده شد. آزمایش‌ها در 5درصد وزنی مختلف فاز آلومینا (5، 15، 25، 35 و 45) با نسبت سوخت به اکسیدکننده 25/1 انجام شد و نمودارهای دما برحسب زمان در حین انجام سنتز رسم شد و میزان مقاومت به سایش نمونه‌ها مطالعه شد. نتایج نشان داد در نسبت 25درصد وزنی فاز آلومینا میزان مقاومت به سایش زیرلایۀ مسی پوشش‌داده‌شده تا حدود 4برابر افزایش یافت. همچنین میکروساختار و فازهای تشکیل‌شده این پوشش با میکروسکوپ‌های SEM مجهز به EDS،TEM   و آنالیز XRD بررسی شد که نتایج تولید پوشش نانوکامپوزیتی مس‌آلومینا را در یک مرحله در اتمسفر هوا تأیید کرد.

کلیدواژه‌ها


عنوان مقاله [English]

The Increase in the Wear Resistance of Copper Substrate Coated by Cu-Al2O3 Nanocomposite Through Solution Combustion Method

نویسندگان [English]

  • Hadi Nasiri 1
  • Ehsan Mohammadi 2
1 Department of Materials Engineering, Mechanics and Materials Engineering Faculty, Birjand University of Technology, Birjand, Iran.
2 Department of Materials Science and Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran.
چکیده [English]

Solution Combustion is a new and low costs method in order to synthesis nanomaterials. In the presented investigation, Copper and Aluminum nitrates, Urea and Graphite are used as oxidizer, fuel and auxiliary materials, respectively. All experiments categorized in five groups in terms of percentage of alumina (5, 15, 25, 35 and 45 wt. %) and fuel to oxidizer ratio of 1.25. Time- Temperature diagrams are plotted during reaction and wear tests carried out for all samples. Results showed, sample with 25 wt. % alumina can increase the wear resistance 4 times than non-coated copper substrate. Also, the coating microstructure were investigated by SEM equipped by EDS, TEM and XRD. The results proved synthesis of nanocomposite copper-alumina coating just in one-step.

کلیدواژه‌ها [English]

  • Copper-Alumina Nanocomposite
  • Solution Combustion
  • Wear Resistance
  • Combustion Temperature
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