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Using New Chemical Materials as Coating Layers for Minimizing Friction and Wear

إمكانية استخدام مواد كيميائية جديدة كطبقات تبطين للتقليل من الاحتكاك و الإهتراء و التآكل

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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This study deals with the friction and wear behavior of coating layers (fluoride and Graphite).The coatings are thermally sprayed on cast iron disks. Sliding is performed between cylindrical pins manufactured from organic brake linings and the coated and uncoated disks. The coatings are characterized by measuring their hardness, porosity, and corrosion resistance. The corrosion resistance of the coating is tested by exposure to Nacl for 150 hours; the coating layer has had the best corrosion resistance. The friction and wear tests are conducted under contact pressures of (1.5 MPa to 7 MPa) and sliding speeds of 1 and 3 m/sec.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة سلوك الاحتكاك والإهتراء لطبقات التبطين المركبة من مادتي الكربون والفلور. تم رش هذه الطبقات حرارياً على أقراص مصنوعة من حديد الصب، وتم إجراء اختبارات الانزلاق بين مسامير أسطوانية مصنوعة من مواد تبطين مكابح عضوية والأقراص المطلية وغير المطلية. تم قياس خواص القساوة والمسامية ومقاومة التآكل لهذه الطبقات بعد تعريضها لمادة Nacl لمدة تزيد عن 150 ساعة. أظهرت النتائج أن طبقة التبطين المركبة من الكربون والفلور تتميز بأفضل مقاومة للتآكل. تم إجراء اختبارات قياس قيم التآكل والاحتكاك عند قيم ضغط تماس متفاوتة وسرعات انزلاق مختلفة. أظهرت النتائج أن الطبقات المركبة من الكربون والفلور توفر احتكاكاً ثابتاً ومقاومة تآكل عالية، مما يجعلها مناسبة للاستخدام في قطاع السيارات.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال تحسين مواد التبطين المستخدمة في المكابح، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، لم يتم التطرق بشكل كافٍ إلى تأثير درجات الحرارة العالية جداً التي قد تصل إلى 800 درجة مئوية، وهي ظروف تشغيل قد تكون واقعية في بعض التطبيقات. ثانياً، الدراسة ركزت على مادة Nacl فقط كمادة مخرشة، وكان من الممكن اختبار مواد أخرى لمعرفة تأثيرها على مقاومة التآكل. أخيراً، لم يتم تقديم معلومات كافية حول التكلفة الاقتصادية لتطبيق هذه الطبقات في الصناعة، وهو عامل مهم يجب أخذه في الاعتبار عند تقييم فعالية هذه المواد.
Questions related to the research
  1. ما هي المواد المستخدمة في طبقات التبطين في هذه الدراسة؟

    تم استخدام مادتي الكربون والفلور في طبقات التبطين.

  2. كيف تم اختبار مقاومة التآكل لطبقات التبطين؟

    تم اختبار مقاومة التآكل بتعريض الطبقات لمادة Nacl لمدة تزيد عن 150 ساعة.

  3. ما هي الظروف التي تم فيها إجراء اختبارات الاحتكاك والتآكل؟

    تم إجراء الاختبارات عند قيم ضغط تماس متفاوتة بين 1.5 MPa و 7 MPa وسرعات انزلاق 1 m/sec و 3 m/sec.

  4. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    توصلت الدراسة إلى أن طبقات التبطين المركبة من الكربون والفلور تتميز بأفضل مقاومة للتآكل وتوفر احتكاكاً ثابتاً، مما يجعلها مناسبة للاستخدام في قطاع السيارات.


References used
M.G. Jacko , Physical and chemical Changes of organic disc Pads service , wear 1978, 163-175
R.C. Tucker , ASM Handbook : Surface Engineering vol.5 , ASM International, Materials Park , OH , 1992 , Page: 497-509
Koaf.H. , Leea c.y. , Koac.J. ,chuT.c. ,carbon , Blaise Pascap,France,2005, 559-565
BHARAT Bhushan , B.K. Gupta , Handbook of Tribology : Materials, Coatings , and Surface theatments , McGraw – Hill , New York 1991,Page: 59-60
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