Abstract
This work presents results in the field of synthesis of new metal matrix composites with matrix NiTi and particles TiB2, and their use as additives to fabricate metal matrix composites based on the Inconel 625 alloy. NiTi-TB2 powders were obtained using self-propagating high-temperature synthesis. Composite NiTi-TiB2 particles were spheroidized on a high-frequency induction plasmatron. Composite NiTi-TB2 particles were mixed with metallic Inconel 625 powder with particle sizes of 50–150 µm. We used direct laser deposition by means of mixture of powders to grow samples with different contents of ceramics in the metal matrix. The process of direct laser deposition during the experiment was investigated. We have determined the peculiarities of the formation of the structure in metal matrix composites with different contents of titanium diboride. We have demonstrated the possibility of using Direct Laser Deposition (DLD) for fabricating items from ceramic metal materials. We have determined promising fields of further research for the purpose of obtaining efficient metal matrix composites using additive manufacturing technologies.
Highlights
Judging by global experience in the development of approaches in modern material science and new technological solutions, we must admit that the fabrication of assemblies and individual parts from new construction and functional materials is impossible without the development of additive manufacturing (AM)
We suggest a solution to this problem—a method of obtaining composite particles based on the methods of self-propagating high-temperature synthesis (SHS)
For scanning electron microscope initial structure of the the fabricated materials were researched wereThe prepared, a thin layer of powders silver wasand deposited on thecomposition surface of the ceramics, and the using scanning electron microscopy on a Company, Thermo analyses were performed
Summary
Judging by global experience in the development of approaches in modern material science and new technological solutions, we must admit that the fabrication of assemblies and individual parts from new construction and functional materials is impossible without the development of additive manufacturing (AM). For the purpose of resolving the problem of homogeneity of nanoparticle distribution of hard-melting particles within metal matrices in powders, an interesting research study has been conducted in [32] Those researchers obtained a mechanical mixture of titanium-aluminium and niobium alloy powders. The suggested methods allow for obtaining the following composites: Al3 Ti-TiB2 , Ti3 Al-TiB2 , Ni-TiB2 , Fe-TiB2 , Al-TiB2 , NiCr-TiB2, Fe-Si3 N4 , Fe-TiC, among others Producing such compositions via traditional methods of mechanical activation is virtually impossible, since the grinding of ceramic powders and their introduction into the metal matrix is a technologically intensive process that introduces many impurities. Titanium diboride is a good candidate for producing MMCs. the aim of this research was the investigation of direct laser deposition processes in the production of metal matrix Inconel 625/TiB2 composites, and the research and assessment of the structure of the materials obtained. It allows for printing large items (including those with a gradient structure) from multiple materials of arbitrary configuration and complexity, without additional devices and attachments
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