Northwestern Polytechnical University

Haijun Su

Jun Zhang

Taiwen Huang

Wenchao Yang

Yinuo Guo

Meng Wang

Yong Zhao

Min Guo

Hengzhi Fu

Haifang Liu

Yuan Liu

Zheliang Liu

Dianyun Wang

Zhonglin Shen

Hui Shen

Shaoying Li

Lin Liu

Minghui Yu

Di Zhao

Huating Chang

Disclosed are a nickel-based superalloy formed by selective laser melting and a preparation method thereof. In the method, CrFeNb alloy powder is used as a grain refiner, and its element composition is within the composition range of a nickel-based superalloy powder to ensure that the prepared nickel-based superalloy has the same element composition with the original alloy; the grain size in the nickel-based superalloy could be refined by the addition of CrFeNb alloy powder, such that the anisotropic columnar grain structure in the alloy is transformed to equiaxed grain structure, thereby improving mechanical properties of the alloy.

Nickel-based superalloy formed by selective laser melting and preparation method thereof

A device and a method for continuous temperature gradient heat treatment of a rod-shaped material are disclosed. The furnace body of the device includes an upper heating zone and a lower heating zone inside, which are independently controlled in temperature by means of an upper heating power supply and a lower heating power supply. Moreover, both the upper heating zone and the lower heating zone are closed heating zones. The closed heat insulation plates could prevent heat loss and ensure precise temperature control of the upper heating zone and the lower heating zone. In the device, a vacuum pumping equipment is included; an annular radiation screen is configured between the upper heating zone and the lower heating zone, and the rod-shaped material is not in contact with the annular radiation screen The rod-shaped material conducts one-dimensional heat transfer along the axial direction.

Device and method for continuous temperature gradient heat treatment of rod-shaped material

The disclosure provides a eutectic ceramic thermal barrier material and a preparation method thereof, which relates to the field of composite materials. The present disclosure provides a eutectic ceramic thermal barrier material comprising a nickel-based superalloy substrate, an intermediate binding layer and a eutectic ceramic cladding layer stacked sequentially; the intermediate binding layer comprises a NiCoCrAlY binding layer; the eutectic ceramic cladding layer comprises an AlO/GdAlObinary eutectic ceramic coating or an AlO/GdAlO/ZrOternary eutectic ceramic coating. The eutectic ceramic thermal barrier material provided by the present disclosure has good high temperature resistance, good oxidation resistance and excellent mechanical properties.

Eutectic ceramic thermal barrier material and preparation method thereof

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Xi'an, China

Haijun Su