Development of Aggregated Ceramic-based Nanomaterials

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Tekna inductively-coupled plasma technology can produce nanomaterials of various natures (1D to 3D) andcompositions which can be used as reinforcing agent in structural parts (like metal matrix composites, MMC),or as building blocks of components. However, nanomaterials like nanopowders and nanotubes tend to formagglomerates which prevent their homogeneous dispersion in a solid matrix, thus seriously limiting theirimpact on the performances of composite materials. The main challenge consists in developing a preparationmethod suitable for these nanomaterials and adapted to the shaping process that will produce final parts.Aggregated (bonded) nanopowders of large apparent particle sizes can be used for ensuring the good dispersionof a nanomaterials in a matrix, while being easier and safer to handle. In this context, Tekna would like todevelop an approach for aggregating nanopowders and would like to explore two material systems - thegadolinium zirconate (GZO) nanopowder and the boron nitride nanotubes mixed with metallic sphericalparticles (MSP-BNNT composite). The objective of this project would be developing methods of preparingaggregates of the two material systems respectively. An extrusion-flaking-grinding process for the GZOnanopowder and a hot-pressing-grinding process for the MSP-BNNT composite are proposed by UWO for thisresearch. These two innovative techniques are inspired from current powder coating manufacturing, whichfeatures low-cost, high energy-efficiency and flexibility in formulation variations. They are expected to resolvethe problems that Tekna currently has. The results of this project will be tested and validated by Tekna andtheir Canadian customer. Successful outcomes generated from this project will benefit both Tekna and theircustomer and will create new business opportunities with industries requiring high performances materials likeaerospace. With the knowledge and expertise Dr. Zhang has in this area, also with the close collaborationbetween UWO and Tekna, this research is expected to elevate Tekna's technology in this area and place Teknain the leading position in manufacturing such advanced materials.