Laser Melting Ceramics

The selective laser melting of the ceramic materials zirconia and alumina has been investigated experimentally.

Laser melting ceramics.

This requires a subsequent debinding and furnace sintering step in order to produce the final ceramic parts. For example with the optimized process parameters the laser processed part yielded a relative density of approximately 100 without any post processing. Laser beam melting lbm also known as selective laser sintering melting sls slm is an additive manufacturing am process using a layer by layer fabrication procedure in which the laser beam energy is used to build up a 3d part from a powder bed. According to previous research both laser power and laser scanning speed had significant effect on the thermal behavior of melting pool but maximum temperature and the extremum of heating rate and cooling rate were more sensitive to the change of laser.

Topics included are powder and layer deposition process melting mechanism and modelling and other melting based techniques. Indirect sls involves laser melting of a sacrificial organic binder phase in the polymer ceramic composite powder to produce green parts. Potential and challenges in laser melting of ceramics are discussed. The laser melting of ceramics with various assisted methods has been investigated 21 22.

A wear resistant al 2 o 3 ceramic sheet was used as a substrate and its size was 17 5 mm 17 5 mm 5 mm. Herein we report on 3d printing of tib 2 tib ti composites from tib 2 ti powder mixture of high ceramic content 50 wt tib 2 by an optimized process of selective laser melting. In order to reduce thermally induced stresses the ceramic is preheated to a temperature of at least 1 600 c during the build up. Selective laser sintering or melting sls slm techniques are first introduced followed by analysis of results from silica sio2 zirconia zro2 and ceramic reinforced metal matrix composites.

In situ synthesized from the mixture of commercially pure ti and tib 2 powders the composites possess up to 20 4 gpa hardness despite of a relatively high porosity of. The secondary laser helped to reach the melting temperature of the ceramics and led to a large melting pool. The approach followed up is to completely melt zro 2 al 2 o 3 powder mixtures by a focused laser beam.