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The dry sliding friction and wear behavior of Ti 2 AlN/TiAl composite (TTC) at room temperature were investigated through the determination of coefficient of friction (COF) and wear loss in different conditions and the analysis of the compositions of wear debris and the worn surfaces of both TTC and GCr15 steel. Experimental results have shown that at the constant sliding speed (0.5m/s) and...
Organic copper salts have been found to be effective additives for lubricating oils owing to their multifunctional performance. However, little attention has been paid to the comparative investigation of the behaviors of Cu(I) and Cu(II) organic salts as lubricating oil additives. In this paper, both Cu(I) and Cu(II) dialkyldithiophosphates were synthesized and their friction-reducing and antiwear...
Seizure of contact elements is a serious failure of tribological systems. Investigating seizure processes and understanding seizure mechanisms are important for failure prevention. Research on seizure failure can provide directions to improve designs of tribological elements for longer life and higher load capacity. This paper reviews the studies on seizure failure of journal-bearing conformal contacts...
The tribological behaviour of polyetheretherketone (PEEK) filled with nanometer ZrO 2 was studied. The composite blocks with different filler proportion and particle size were prepared by compression moulding. The friction and wear properties of nanometer ZrO 2 -filled PEEK were investigated under ambient conditions on a block-on-ring machine by running the PEEK composite block against...
A series of erosion-corrosion (E-C) tests was carried out on hypersonic velocity oxygen fuel (HVOF) carbide-metal cermet coatings specimens at elevated temperature under conditions that attempted to simulate the erosion conditions found in fossil-fired boilers. The coatings included tungsten carbide, niobium carbide, and titanium carbide with different fractions of metal binder phase. Angular SiO...
The nanometer Si 3 N 4 filled polyetheretherketone (PEEK) composite blocks were prepared by compression molding. The friction and wear properties of nanometer Si 3 N 4 filled PEEK were investigated on a block-on-ring machine by running the PEEK composite block against a plain carbon steel (AISI 1045 steel) ring. The morphologies of the wear traces and the transfer film...
The erosion-corrosion (E-C) behavior of two steels (AISI 1018 low carbon steel, Type 304 stainless steel) and several thermal spray coatings by fly ash from a biomass-fired boiler was determined in laboratory tests using a nozzle type elevated temperature erosion tester. The coatings included Hypersonic Velocity Oxygen Fuel (HVOF) thermal sprayed coatings on the mild steel (Cr 3 C 2 ...
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