Processing methods of zirconia ceramics and main problems in processing

Release time：2024-09-12click：1

Zirconium oxide ceramic is an inorganic non-metallic material sintered at high temperature. It has the advantages of high temperature resistance, corrosion resistance, wear resistance and thermal shock resistance. In recent years, with the advancement of ceramic toughening and strengthening technology and the development of mechanical processing methods, the application scope of zirconia ceramics has rapidly expanded.

1. Processing of zirconia ceramic processing Method
Zirconium oxide ceramic processing methods are commonly divided into two categories: mechanical processing, mold injection molding, etc. Among them, the mechanical processing method is highly efficient, so it is widely used in industry. It has been widely used, especially diamond grinding wheel grinding, grinding and polishing are more common.

2. Main issues in zirconia ceramic processing< /span>
Although there are many methods for processing zirconia ceramics, the processing costs are high, the processing efficiency is low, and the processing accuracy is poor. One of the main reasons for this is that ceramics are very hard. For the green body or calcined body of zirconia ceramics, cutting is mainly used for rough processing, and grinding is used for finishing after sintering (the process of converting powdery materials into dense bodies).

Latest modelZirconium oxide/metal (assembly)

Depending on the different conditions of the zirconia ceramic, it can also be directly ground without mechanical processing Process the sintered body to achieve the design accuracy (accuracy). As far as the processing process is concerned: zirconia ceramics are almost similar to metal parts, but zirconia ceramics have machining allowances. strong> is much larger when ceramic rough machining is easy to occur due to insufficient strength or surface processing defects, or due to insufficient clamping. , and cannot obtain the required final machining shape. Since the shrinkage cannot be maintained uniformly during sintering, the size must not be too close to the final size during rough machining, so the margin for finishing is large. For metal processing, precision machining is required. If the machining allowance takes into account the black skin caused by thermal deformation and heat treatment, a few hundred millimeters should be left as much as possible. For ceramic processing, the finishing allowance needs to be several millimeters or even tens of millimeters. Productivity decreases and production costs increase

Another problem with zirconium oxide ceramic processing is that the cost of processing tools is high, and cutting requires expensive sintering (to convert powdery materials into For diamond and CBN tools, diamond grinding wheels are mainly used for finishing, so the cost of the tools is dozens to hundreds of times higher than the tools used for metal cutting. The strength of zirconia ceramics isThe processing conditions are sensitive (sense) and it is difficult to achieve high-efficiency processing, so the processing cost of zirconia ceramics is much higher than that of ordinary materials.