کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
616005 1454860 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tribo-physical and tribo-chemical aspects of WC-based cermet/Ti3SiC2 tribo-pair at elevated temperatures
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Tribo-physical and tribo-chemical aspects of WC-based cermet/Ti3SiC2 tribo-pair at elevated temperatures
چکیده انگلیسی

The tribological behaviors of tungsten carbide (WC) based cermet/Ti3SiC2 tribo-pair at elevated temperatures were investigated. Lead oxide (PbO) was added as a solid lubricant. The tribo-physical and tribo-chemical changes on sliding surfaces were studied in detail. The results indicated that adhesive and abrasive wear due to removal of metallic binder and pullout of grains were the dominant wear mechanisms at room temperature. At high temperature, tribo-physical changes (i.e. mechanical mixture or sintering) and tribo-chemical reactions including complex reaction and oxidations were induced by frictional heat combined with high environmental temperature. As a result PbWO4 was formed as a reaction product and acted as a solid lubricant. PbWO4 and tribo-oxides along with the physically changed layer on the sliding surfaces were favorable to reduce wear of both materials. At high temperature, the wear mechanism varied from adhesive and abrasive wear at room temperature to lubrication by tribo-layer containing PbWO4, tribo-oxides, and sinters at high temperatures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tribology International - Volume 43, Issues 1–2, January–February 2010, Pages 512–517
نویسندگان
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