Wear of an alumina-silicon carbide whisker composite

Surface and Bulk Oxidizing Species for Self Lubricating Ceramics

“…Similarly, Yust et al observed severe wear and high coefficients of friction (-0.55-1.28) during unlubricated, high temperature, pin-on-disk testing of an A1 2 0 3 /SiC composite [4]. Others [5,6] have supported these conclusions with tests including unlubricated Si 3 NN 4 on Si3N4 and Si 3 N4 on M-50 Steel.…”

Influence of the SiC grain size on the wear behaviour of Al2O3/SiC composites

“…Yust et al 6 performed self-mated dry pin-on-disc wear tests on Al 2 O 3 /SiC whisker composites, reporting a decrease in the wear rate of almost two orders of magnitude when SiC whiskers were added to an Al 2 O 3 matrix. Liu et al 7 found comparable results using a cylinder-on-cylinder configuration under lubrication where one of the cylinders was the ceramic composite and the other was carburized steel.…”

“…It was observed that the fracture changed from intergranular in the composites containing coarse SiC particles to transgranular in the nanocomposites. 4,5 The tribological properties of Al 2 O 3 composites containing SiC whiskers, platelets or nanoparticles have been also studied, [6][7][8][9][10][11][12][13][14][15] although a comprehensive analysis of data reported in the literature is complicated, due to the wide gamut of test configurations and experimental parameters. As a general rule, the addition of SiC particles improves the wear resistance of the composites compared to that of the monolithic alumina as detailed below.…”

Friction and wear behavior of in-situ reinforced silicon nitride. Final report

“…The m i c r o s t r u c t u r a l d i s c o n t i n u i t i e s accompanying t h e i n c l u s i o n s a p p a r e n t l y promote localized increased w e a r rates, b u t t h e e x t e n t of w e a r may be restricted t o t h e v i c i n i t y of t h e i n c l u s i o n by t h e i n -s i t u r e i n f o r c e d microstructure. for comparison [6].…”

“…A t r a n s i t i o n is n o t observed f o r ISRSN, b u t an approximate l i n e of c o n s t a n t w e a r f a c t o r i s l o c a t e d on t h e basis of w e a r f a c t o r s f o r t h e a d j a c e n t data p o i n t s . Wear mode t r a n s i t i o n data f o r WRSN from an earlier s t u d y are also shown [ 6 ] . 4 .…”