In this research, the heat transfer model of surface grinding temperature field with nanoparticle jet flow of MQL as well as the proportionality coefficient model of energy input workpiece was established, respectively. The numerical simulation of surface grinding temperature field of three workpiece materials was conducted. The results present that, in the workpiece, the surface temperature was significantly higher than the subsurface temperature, presenting relatively large temperature gradient along the direction of workpiece thickness. The impact of the grinding depth on grinding temperature was significant. With the increase of the cut depth, peak values of the grinding temperature rocketed. Distribution rules of the temperature field of 2Cr13 in four cooling and lubrication approaches were the same. Based on the excellent heat transfer property of nanofluids, the output heat through the grinding medium acquired an increasingly high proportion, leading to the drop of the temperature in the grinding zone. For the same cooling and lubrication conditions, grinding temperature presented insignificant changes along the direction of grinding width. Yet, under different cooling conditions, the temperature variation was significant. MQL grinding conditions with additive nanoparticles demonstrated great impact on the weakening of temperature effect on the grinding zone.
Hydrogen plasma-metal reaction (HPMR) method is applied successfully for large scale synthesis of nanoparticles of titanium aluminides, from binary Ti-Al master alloys with Al content varying from 5 to 75 at-%. The average size, phase constitution and chemical composition of the as synthesised nanoparticles are characterised and related to the master alloy composition and processing parameters. Results show that Al content in the as synthesised nanoparticles deviates positively from that of the master alloy. The maximum generation rates of Al and Ti occur at Al content about 35 and 20 at-% in the master alloy respectively. The average size of the nanoparticles increases with increasing Al content in the master alloy, with a peak at 35-45 at-%; for the same Al content, it increases with increasing chamber pressure and saturates at the chamber pressure of 0.080 MPa.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.