Kunming University of Science and Technology

Xiaoyu Chong

Jun Wang

Lin Chen

Jing Feng

Zhenhua Ge

Peng Wu

Peng Song

Qi Zheng

Kailong Yang

Yunxuan Zhou

Fushuo Wu

Chao Li

The present disclosure provides a high-entropy rare earth-toughened tantalate ceramic. The ceramic is prepared by sintering TaOpowder and x types of different REOpowder, 4≤x≤9, and the molar ratio of the REOpowders is 1. REOpowder and TaOpowder having the molar ratio of RE to Ta being 1:1 are weighed, a solvent is added for mixing, and ball milling is performed by a ball mill to obtain mixed powder M; the powder M is dried at a temperature of 650-850° C. for 1.5-2 h to obtain dried powder; the powder is sieved to obtain powder N, the powder N is placed in a mold for first pressing to obtain a rough blank, and the rough blank is then pressed for the second time to obtain a compact blank; the compact blank is sintered to obtain the high-entropy rare earth-toughened tantalate ceramic.

High-entropy rare earth-toughened tantalate ceramic and preparation method therefor

The present disclosure belongs to the field of preparation technology and provides an ultralimit alloy and a preparation method therefor. The ultralimit alloy comprises an alloy matrix. A bonding layer and a ceramic layer are successively deposited on a surface of the alloy matrix. The alloy matrix includes one of a magnesium alloy matrix, an aluminium alloy matrix, a titanium alloy matrix, an iron alloy matrix, a nickel alloy matrix, a copper alloy matrix, a zirconium alloy, and a tin alloy. For an ultralimit magnesium alloy, an ultralimit aluminium alloy, an ultralimit nickel alloy, an ultralimit titanium alloy, an ultralimit iron alloy and an ultralimit copper alloy, the bonding layer is a composite bonding layer, the ceramic layer is a composite ceramic layer, and the outside of the composite ceramic layer is further successively deposited with a reflecting layer, a catadioptric layer, an insulating layer and a carbon foam layer.

Ultralimit alloy and preparation method therefor

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Yunnan, China

Xiaoyu Chong