Geometry and Microstructure Control of Remanufactured Metallic Parts by Cold Spray Additive Manufacturing.

Cold Spray Additive Manufacturing (CSAM) is a thermal spray technique that is typically used for the repair of metallic components. One of the challenges of CSAM is to improve the geometrical accuracy of the sprayed parts, along with overcoming the inferiority of the mechanical properties of the deposits by tailoring their microstructure with different deposition strategies. For this, Cu, Al, Ti, and Ti6Al4V substrates were reconstructed by two Cold Spray (CS) methods: Traditional (T) and a novel strategy, Metal Knitting (MK).

Centrifugal Atomization of Glass-Forming Alloy AlNiYLa.

Centrifugal atomization is a rapid solidification technique for producing metal powders. However, its wide application has been limited to the production of common metal powders and their corresponding alloys. Therefore, there is a lack of research on the production of novel materials such as metallic glasses using this technology.

Metal Knitting: A New Strategy for Cold Gas Spray Additive Manufacturing.

Cold Spray Additive Manufacturing (CSAM) is an emergent technique to produce parts by the additive method, and, like other technologies, it has pros and cons. Some advantages are using oxygen-sensitive materials to make parts, such as Ti alloys, with fast production due to the high deposition rate, and lower harmful residual stress levels. However, the limitation in the range of the parts' geometries is a huge CSAM con.

Development of Bioglass/PEEK Composite Coating by Cold Gas Spray for Orthopedic Implants.

Cold gas spray (CGS) technology has allowed the development of biofunctional coatings composed of 45S5 and polyetheretherketone (PEEK). The combination of a bioactive glass material embedded in a polymeric matrix makes this composite an interesting material for orthopedic applications since this composite meets the biomechanical and biological requirements of an implant. In the present study, blends of bioactive glass 45S5 and PEEK powder with different granulometry and 45S5/PEEK ratio have been prepared.

NOx Storage on BaTiCuO Perovskite Catalysts: Addressing a Feasible Mechanism.

The NOx storage mechanism on BaTiCuO catalyst were studied using different techniques. The results obtained by XRD, ATR, TGA and XPS under NOx storage-regeneration conditions revealed that BaO generated on the catalyst by decomposition of BaTiO plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O and NO/N show that nitrites and nitrates are formed on the perovskite during the NOx storage process.

BaFeCuO Perovskites as Active Phase for Diesel (DPF) and Gasoline Particle Filters (GPF).

BaFeCuO perovskites ( = 0, 0.1, 0.3 and 0.