Comparative Experimental Study of Tribo-Mechanical Performance of Low-Temperature PVD Based TiN Coated PRCL Systems for Diesel Engine

Table 10

Summary of tribological results trade-offs, the percentage changes in mean COF, and cylinder liner wear rate are calculated in comparison to the PRCL 1 (as is scenario).

PRCL system	Sample ID	Surface Roughness	Coating Thickness	Comparison with mean COF of PRCL 1	Comparison with cylinder liner wear rate of PRCL 1
PRCL 1	Uncoated Cylinder Liner against Cr Coated Piston Ring
	1	0.55μm	N/A	N/A	N/A
PRCL 2	TiN Coated Cylinder Liner against TiN Coated Piston Rings
	1	Fine sample	1.920μm	95%	3%
	2	Rough sample	1.920μm	122%	-32%
	3	Fine sample	3.523μm	45%	-23%
	4	Rough sample	3.523μm	96%	-44%
	5	Fine sample	5.120μm	-47%	-53%
	6	Rough sample	5.120μm	-24%	-62%
PRCL 3	TiN Coated Cylinder Liner against Cr Coated Piston Rings
	1	Fine sample	1.920μm	-11%	-97%
	2	Rough sample	1.920μm	-23%	Negative wear rate shows excellent wear resistance
	3	Fine sample	3.523μm	5%
	4	Rough sample	3.523μm	-9%
	5	Fine sample	5.120μm	12%
	6	Rough sample	5.120μm	-2.60%
PRCL 4	Uncoated Cylinder Liner against TiN Coated Piston Ring
	1	0.55μm	N/A	37%	15%