Feasibility Study of Selective Laser Melting for Metal Matrix Diamond Tools

Abstract

<jats:p>Metal matrix diamond composite samples were fabricated by selective laser melting (SLM) at different forming parameters to investigate the feasibility and new challenges when SLM is applied to diamond tools manufacturing. The surface topographies, Rockwell hardness, compactness, microstructure, and diamond thermal damage of the samples were investigated in this study. The fabricated samples had high porosity and relatively low Rockwell hardness and compactness, and some ridge-shaped bulges and textures were observed at the edges and surfaces. Microstructure analyses showed that diamond particles were homogeneously distributed and metallurgically bonded within the metal matrix. The thermal damage pits on the diamond crystals along the scanning direction were the dominant damage type for SLM, which was completely different from conventional vacuum brazing and hot-pressing sintering. Although some challenges need to be further studied, our results demonstrate that SLM has great potential to propel the development of metal matrix diamond tools.</jats:p>

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“…The laser beam skipped the diamond particles, which is the main problem in this method. The defects are reduced using an online recognition system to identify the particles [49].…”

The Influence of Heat Treatment Temperature on Tensile Properties of Metal-Bonded Diamond Composites Fabricated via Selective Laser Melting

“…Although SLM technology is considered an effective and viable method of fabricating high-performance diamond-grinding tools, defects such as high porosities, micro-cracks, and thermal damage pits still exist because of high cooling rates and internal stresses during SLM fabrication. These issues must be overcome when considering their potential for further application [19,20]. Generally, it is difficult to eliminate these defects during the SLM process.…”

Laser Fusion of Aluminum Powder Coated with Diamond Particles via Selective Laser Melting: Powder Preparation and Synthesis Description

“…Currently, the application of different carbon allotropes in the MMC was studied [16,17]. Among these allotropes, the metal matrix diamond composite has the highest strength and is widely used to manufacture various diamond cutting and drilling tools.…”