Research On The Mechanism And Process Of ZTA Ceramic Bonded Abrasive Grinding

Because of their very high physical as well as of their chemical capabilities,and because they can be widely used in many applications both in aerospace for the military,for the manufacturing and the medical use of equipment,they are the most difficult of all materials to work with and because of their very high surface area and the high cost of traditional free wheel abrasive processing.It is extremely important because of the very long time and cost for the machining and the surface of the work after the machining.For the resolution of the inconvenient of the conventional work of free polishing,the solid grinding work technology has been developed,and this technique has been adopted for the solidification for the abrasives to be cemented by the binders into the substrate,which has increased in the controllability to the grinding work and decreased that the damage which is caused into the work of the surface,which has resulted into the high-quality work of surface.As a consequence,it can improve both the control over the grinding of the substrate at the workpiece area and the time and cost for the subsequent processes.For the determination from this paper is the grinding of the ZTA certificate with the purpose from which Grinding mechanism is to be clarified,work has been made in three major area as follows:(1)It was investigated that the influence on the grinding pressure,and the speed at which the solidification of the grinding solid was made on the grind of all the ceramics.With the increasing the abrasive pressures,it was shown with the increasing in the material extraction and the increasing for the surface of ZTA and the increasing of the polishing disc and the increasing the grinding speed,with the increasing for the surface area of ZTA,with the increasing for the material and the decreasing for the surface area of ZTA,and the adding of sodium hydroxide in the grinding solution has the most obvious effect to improve the material extraction and reduce the surface area of the grinding workpiece compared with other chemical members.(2)The nano-indentation/scratch technique has been used in the grinding on the ZTA granules for the investigation into the mechanism of the solidified grind and the removal of the solidifying grits.During the stress phase of this Nanoindentation test,the nano-hardness of the two ceramic pieces decreased rapidly and stabilized gradually,showing a clear phenomenon of indentation size effect,and the ceramic pieces soaked in this alkaline soluble had a smaller solid hardness.Both the elasticity and plastic transition of the critical deep cut in the ceramic disc of both ZTA and the loading have been significantly more increased during the nanoindentation of the test after being soaked through with the alkaline solution.(3)With the method to analyze and compare with the actual measured work piece subsurface impact on work piece with different fineness of abrasive grind particles,this method has been used to determine and to compare it with the existing simulated work piece with the actual deep damage.All the results show that the subsurface damage depth of the workpiece is in positive coefficient and the simulation and the measurement is in good coincidence,and this is an indictment that the subsurface of the ZTA during grinding is well simulated under that FJM is a model that provides a theoretical basis for predicting the subsurface damage depth and crack expansion of ZTA ceramics ground by solidified abrasives.