2 results about "Non oxide ceramics" patented technology

The present application belongs to the technical field of high-entropy non-oxide ceramics, and relates to a five-element high-entropy boride ceramic powder material and a preparation method and application thereof. The present application adds chlorides of five transition metal elements into a mixed solution of ethanol and acetylacetone, then adds a carbon source and a boron source after reaction, and continues to react to obtain a high-entropy boride liquid precursor; the high-entropy boride liquid precursor is subjected to two-stage drying and two-stage cracking to obtain a high-entropy boride ceramic powder. The prepared high-entropy boride ceramic powder has high configuration entropy, high element distribution uniformity, uniform hexagonal plate-like single crystal structure and good sintering activity, and the preparation method has the advantages of low cost, simple operation, low operation temperature, short reaction time, low equipment requirement and the like, is suitable for large-scale industrial production and has the characteristics of green environmental protection.

The application relates to an ultraviolet light-near infrared light synergic additive manufacturing device and method, which comprises a displacement mechanism, a forming platform connected with the displacement mechanism, an ultraviolet material tank, a cleaning tank and a non-oxide ceramic material tank, the ultraviolet material tank, the cleaning tank and the near infrared material tank are arranged side by side along a preset direction and are all within the operation stroke range of the displacement mechanism, an ultraviolet light source is arranged correspondingly to the ultraviolet material tank, and a near infrared light source is arranged correspondingly to the near infrared material tank. The high-precision characteristics of ultraviolet light curing are used to layer by layer build a soluble resin shell as a sacrificial mold and temporary support, which not only ensures the part contour precision, but also realizes the forming of a cantilever structure, then the high penetration of near infrared light is used to realize the deep heat curing of high refractive index or high light absorption materials (non-oxide ceramics, metals, carbon-based materials and the like) layer by layer, and the mechanical, thermal, electrical and other performances of the workpiece are ensured, and the device has the dual advantages of shape control and property control.