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Cavitation damage is a concern for stainless steel and other metals in seawater environments, and new coatings are needed to resist such surface damage in that kind of environment. Consequently, a NiCr alloy coating, a WC–17Co/NiCr composite coating, a Fe-based metallic glass coating, a WC–(W,Cr) 2 C–Ni cermet coating, and a WC–17Co cermet coating were prepared on metal alloy substrates using...
Nickel aluminide (NiAl) intermetallic compound coatings were in situ synthesized from pre-placed mixed powders of Ni and Al by laser cladding. The phase composition and microstructure of the NiAl coatings were studied by means of X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The effects of laser cladding parameters on the microstructure and friction and wear...
NiCrBSi coating and NiCrBSi/WC-Ni composite coating were produced on stainless steel by laser cladding. The friction and wear behavior of the laser cladding coatings sliding against Si 3 N 4 ball at an elevated temperature of 500°C was evaluated. The morphologies of the worn surfaces and wear debris were analyzed by means of scanning electron microscopy and three-dimensional non-contact...
The friction and wear performances of bonded MoS 2 solid film lubricants with the counterpart steel ball rubbing were investigated in fretting wear conditions in order to inquire into the load-carrying capacity and wear mechanisms of bonded MoS 2 solid film lubricants under dry friction conditions. Experimental results show that the bonded MoS 2 solid film lubricants have excellent...
In the present study, both ultra-fine and coarse Al 2 O 3 –40wt.% ZrO 2 grains were used as the starting materials to prepare ultra-fine structured and micro-structured Al 2 O 3 –40wt.% ZrO 2 composite coatings (coded as NZTA coating and MZTA coating, respectively) by atmospheric plasma spraying. The ultra-fine Al 2 O 3 –40wt.% ZrO ...
Phenolphthalein Poly (ether sulfone) (PES-C) was irradiated with 2.0MeV protons to doses of 0, l.0×10 14 , 5.0×10 14 , 2.5×10 15 and 5.0×10 15 ionscm −2 respectively. To contrast the different effects of ion dose and ion energy, experiments with energies ranging from 0.5 to 2.0MeV and fixed dose of 5.0×10 15 ionscm −2 were also conducted.Results...
The friction and wear properties of Al-Si alloy against Al-Si alloy was investigated using an Optimol SRV Tester with the lubrication of pure ethyleneglycol, ethanolamine, ethylenediamine and triethylenetetramine. The tribo-chemical reactions and the compositions of the boundary film formed on the rubbed surface of Al-Si alloy were examined by X-ray Photoelectron Spectrometer (XPS). The wear debris...
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