کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
618624 1455049 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tribofilm formation and tribological properties of TiC and nanocomposite TiAlC coatings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Tribofilm formation and tribological properties of TiC and nanocomposite TiAlC coatings
چکیده انگلیسی

In a recent work a concept for self lubricating low friction TiC and nanocomposite TiAlC coatings was developed. Here we further investigate the mechanical and tribological properties of these coatings. Under identical deposition conditions, the addition of Al initiates the formation of a nanocomposite consisting of (Ti,Al)C grains in an amorphous carbon matrix. The coefficient of friction is lowered from ∼0.2 to below 0.1 in a pin-on-disc test against steel with unaffected coating wear rate. The lower friction is attributed to a more extensive formation of amorphous carbon and graphitisation on both the counter surface and in the coating wear track. The addition of Al also reduces coating hardness, Young's modulus and the residual stress, which can be explained by the weak carbide-forming ability of Al and the formation of a nanocomposite microstructure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 266, Issues 3–4, 5 February 2009, Pages 379–387
نویسندگان
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