Study On The Preparation And Characterization Of The Ultrafine Bond Using Polyacrylamide-Gel Method

In this paper, the superfinishing ceramic binder powders containing single component and polycomponent of diamond grinding wheel used for grinding were prepared by polyacrylamide-gel method. The grain composition, microstructure and morphology of the single component powders were obtained. The sintering point and the crystallographic structure of the polycomponent powders were investigated. The sample was made by cold press molding and subsequent normal pressure sintering. As contrast, the same composition binder was made with chemical agent and mixed compound melt by high temperature, and then samples were also prepared with thess two different binders. The rupture strength, water absorption, porosity and the volume density of the three polycomponent powders were measured. Add the diamond powders with the mean grain size about 50 nm were added into the above polycomponent powders and then compared every performance with the original samples, to evaluate the performance of the polyacrylamide-gel method. In the test, a combined technique of XRD, FESEM, DSC, TEM, Raman spectroscopy and sintering image device was used.The results showed that, single component oxide powder was easier to formulate calcining temperature and prepared powders with uniform composition, single phase and fine grain, resulting from the simple component. For multicomponent binder system, it was difficult to do forging technology planing, because of the multicomponents and inconformity of organism dissolveing. The gratifying results to a certain extent were received when the calcination was endured longer heat preservation time at low temperature, and binder powders were porosity glassy phase. By contrast, all the properties of diamond ceramic binder prepared by polyacrylamide-gel method were better than the binder prepared by chemistry reagent compounding, and the density, uniformity and bending strength were approximately equal to the binder prepared by doping with glass melting or even higher than it. Homogeneity of structure of the diamond ceramic binder is not only better than other binders, but also the nanodiamond is well-dispersed.