Papers by Author: Wei Rong Huo

Abstract: The correlation between machining performance and mechanical properties of Y-TZP/Al2O3 ceramics with different mechanical parameters was investigated. The grinding experiments indicated that the flexural strength had a definite influence on machining performance of samples. The higher the flexural strength was, the more difficult the sample was to be ground. XRD analysis showed that an increasing amount of the monoclinic ZrO2 would reduce the flexural strength of the samples. As a result, the grinding force that the samples underwent also decreased.

Abstract: For the nano-ZrO2 powders, it is difficult to disperse the particles in a highly concentrated electrolyte. Polymer MZN with composite structure was employed as a dispersant in this work. On the basis of having obtained the optimum quantity of dispersant MZN, the effects of process conditions on stability of Ni-ZrO2 composite electroplating bath were investigated via sedimentation experiments and SEM micrograph. The results showed that the charging sequence have a significant influence on the stability of composite electroplating bath, and the optimum process conditions is that the stable aqueous suspension of 2.5g nano-powders in 100 ml water should be prepared at first by milling for 3 hours, and then the electrolytes were added in it. The well-dispersed composite electroplating bath was obtained, which made sure that the nano-ZrO2 smaller than 30nm was found in the Ni matrix.