Erosion of a converted ceramic coated aluminium alloy

Abstract

Aluminium alloys lack resistance to wear when subjected to erosive conditions. A solution has been the development of ceramic coatings on the surface of the alloy to sustain wear. This work reports the study conducted to evaluate the resistance to abrasion by sand of plates of an aluminium alloy processed to develop ceramic coatings of different thicknesses used in the manufacture of silica sand cores. The samples were subjected to erosion by either silica sand or with the mixture of sand and binder that were blown on the surface of the coated plates to reproduce the conditions to which core moulds are subjected to during sand-core manufacturing. The experimental design contemplated changing the angle of impingement of the plate as well as the pressure and velocity of the sand stream. The results of the tests show the feasibility of replacing traditional tool steel moulds by aluminium coated ones.

A review on wear failure of hydraulic components: existing problems and possible solutions

“…Fleishman was the first to discover SERS in 1974 [105][106][107], who discovered that compared to surface Raman spectra in solution, the properties of surface Raman spectra on rugged electrodes significantly change. The application of a super hydrophobic surface (SHS) to metal will Mechanical alloying Al-Cr-Ni Excellent oxidation resistance Jiahong et al [90] Laser cladding Titanium Chromium Nitride Increase wear resistance Cameron et al [91] Thermal deposition TiNi Mechanical and tribological properties Y Fouad et al [92] Hard facing Cr 3 C 2 Improve mechanical properties Fu et al [93] Thermal spraying WC, CO Improve mechanical properties Agarwal et al [94] Pulse electrode surfacing TiC Improve wear resistance MET Torres et al [95] Sand core manufacturing Silica Improve Abrasion resistance Luo et al [96] Laser deposition Ti6Al4V Improve micro hardness Liu et al [88] Laser cladding Ni/WC-12Co Improve hardness and wear resistance substantially increase its usefulness. Erosion layer electrolytic etching by EDM of beryllium copper alloy (BeCu) in hydrochloric acid electrolyte was used to generate a progressive micro-nanostructure [108,109].…”