Super-hard PVD coating 2025-06-14

Research Progress of Rare Earth Hexaborides 2025-06-07

Research Progress of Rare Earth Borides 2025-05-17

Rare earth borides possess unique mechanical, thermal and electrical properties, especially featuring low work function, high hardness, high melting point, high electrical conductivity, high Young's modulus, good thermal stability and excellent chemical stability. They can meet the requirements of field emission performance, such as low turn-on field and threshold field, large field emission enhancement factor and stable emission current. These materials are widely used in various fields of industry and national defense. Starting from the concept of rare earth borides, this paper introduces their characteristics, applications and research progress at home and abroad, briefly describes the main products of binary and ternary rare earth borides and their synthesis methods, and puts forward suggestions for the future research direction and key contents of rare earth borides in China.

The uses of nano-hafnium nitride 2025-05-10

Preparation of zirconium boride based composite ceramic powder and ablative resistance of spraying coating 2025-04-12

Ultra-high temperature ZrB2/MoSi2 ceramic coating can effectively improve the high temperature ablation resistance of C/C ceramic matrix composites. The composite powder was prepared by spray drying agglomeration granulation method, and then the composite powder was densified by plasma densification process. The influence of plasma densification process parameters on the properties of the treated powder was studied. After plasma densification, the bulk density and fluidity of the powder were significantly improved. The loose pack density and fluidity of ZrB2/MoSi2 powder were 3.26 g/cm3 and 21.5s /50g, respectively. Compared with agglomerated powder, the loose pack density and fluidity were increased by 108.97 % and 59.01 %, respectively. After densification, the oxygen content of the powder was reduced to 0.05 wt.%. The ZrB2/MoSi2 composite powder was almost not oxidized during the plasma densification process. The ablation test of the plasma spraying coating shows that the coating structure is intact and no spalling occurs after ablation, which indicates that the prepared ZrB2/MoSi2 coating has good high-temperature ablation resistance.

Scientists have developed active metal borides and will begin to develop products such as powders and patches 2025-04-05

Korea Advanced Institute of Science and Technology JMCA: Joule heating helps MXene composites to synthesize efficiently, significantly improving catalytic performance 2025-03-15

Effect of molybdenum disilicide addition on the silicon infiltration of graphite 2025-03-01

The "carrier" of high temperature material: zirconium carbide 2025-02-22

Carbon fiber composite materials: the future star in the military industry, high-performance multifunctional materials 2025-02-08

Study on preparation technology of high purity vanadium ingot for processing 2025-01-11

In view of the characteristics of vanadium metal, such as hydrogen storage, high temperature superconductivity, small fast neutron absorption cross section and corrosion resistance to liquid sodium, the market demand for vanadium metal products is increasing, and these vanadium products must be processed using high purity vanadium ingots to meet the requirements. The preparation technology of high purity vanadium ingot is described in detail from the aspects of raw materials, process principle and flow, production impact factor, etc.

Molybdenum disilicide and its composite materials are summarized 2025-01-04