کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
619207 1455055 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tribological behavior of select MAX phases against Al2O3 at elevated temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Tribological behavior of select MAX phases against Al2O3 at elevated temperatures
چکیده انگلیسی

The layered Mn+1ACn ternary carbides – MAX phases – Ta2AlC, Ti2AlC, Cr2AlC and Ti3SiC2 were tested under dry sliding conditions against alumina at 550 °C and 3 N load (for a stress of ≈0.08 MPa) using a pin-on-disk tribometer. Ta2AlC and Ti2AlC exhibited low specific wear rates, SWRs, (≤1 × 10−6 mm3/N m), while the coefficients of friction, μ, were ∼0.9 and ∼0.6, respectively. At 0.4, μ of Ti3SiC2 was the lowest measured, but the SWR, at ≈2 × 10−4 mm3/N m, was high. With a μ of 0.44 and a SWR of 6 × 10−5 mm3/N m the Cr2AlC sample was in between. No visible wear of Al2O3 counterparts was observed in all the tribocouples. Tribofilms, which were mainly comprised of X-ray amorphous oxides of the M and A elements and, in some cases, unoxidized grains of the corresponding MAX phases, were formed on the contact surfaces. The correlations between observed tribological properties and tribofilm characteristics are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 265, Issues 3–4, 31 July 2008, Pages 560–565
نویسندگان
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