Papers by Keyword: Ceramic Part

Abstract: The results of the study of the influence of the grinding regimes and the characteristics of the diamond tool on the strength and the surface layer of the ceramic parts based on silicon nitride are presented in this article. The revealed regularities of the surface layer and defect formation have been used to develop a model of the forming of the surface layer of the ceramic parts. The proposed model will increase operational resource resistance of the ceramic parts by 10–25%.

Abstract: The topic is according to the laminated-speed Gel-type technology to design all the parts of the RP machine, establish the 3D model，assemble the parts together by Pro/E，set the parameters, such as motor parameters and so on, and finally achieve the 3D simulation of the device. The real movement process can be seen by the simulation. It is also available to analyze the rationality of the design according to the simulation. Besides, ANSYS is used to analyze the distortion of the workbench, and a certain degree of distortion is found to have affected the precision of the ceramic parts process at some extent. Based on this, the structure is changed and analyzed again, and then all the requirements have been met. At last, a control system is designed in accordance with requirements of the rapid prototyping machine. Thus the whole design of the machine is completed.

Abstract: This paper presents a layer additive method, ceramic laser curing, to form a ceramic part with inner channel features, by which silica powder is bonded by curing effect under disposal of a 20W CO2 laser. This process includes four steps: making slurry by mixing a binder with ceramic powder, paving the slurry on the surface of a platform, scanning the paved slurry layer via laser beam, removing the un-cured slurries from the solidified ceramic component. This process needed only low laser power to build ceramic parts by using “curing effect”. The deflection and shrinkage of ceramics could be decreased, also the distortion due to post sintering process was avoidable. The inner channel structures were support by ceramic slurries to avoid the sagged deflection and to maintain the dimensional accuracy. The maximum flexural strength of the cured specimen was 4.7 MPa. This process has potential to fabricate inner complex ceramic components for industrial applications.