Cemented carbides have been known for about a hundred years and are now widely used in mining, civil road construction, mechanical engineering. Their improvement requires the development of novel technologies based on fundamentally new approaches. Here method microstructure analysis using computer processing with elements machine learning artificial intelligence is proposed. It has applied to m...

Conduction and valence band states for the highly mismatched alloy (HMA) Ge:C are projected onto Ge crystal states, vacancy Ge/C atomic orbitals, revealing that substitutional carbon not only creates a direct bandgap but also new conduction is optically active. Overlap integrals of state with from unperturbed show cannot be attributed to any single mixture multiple states. The Γ valley plays la...

The thermogravimetric analysis on TaC, HfC, and their solid solutions has been carried out in air up to 1400 ◦C. Three solid solution compositions have been chosen: 80TaC-20 vol % HfC (T80H20), 50TaC-50 vol % HfC (T50H50), and 20TaC-80 vol % HfC (T20H80), in addition to pure TaC and HfC. Solid solutions exhibit better oxidation resistance than the pure carbides. The onset of oxidation is delaye...

Laves-phase precipitation and coarsening of tungsten strengthened 9% Cr steel under thermal aging at 923K up to 8000 h was reported in this paper, where the information of the evolution of mean particle size, the number density, the volume fraction of Laves-phase precipitates and the partition coefficients of W and Mo in the matrix over the aging time were determined. The change of hardness ove...

SUS440 is a high-carbon stainless steel, and its martensite matrix has high heat resistance, high corrosion resistance, and high pressure resistance. It has been widely used in mechanical parts and critical materials. However, the SUS440 martempered matrix has reliability problems in thin plate applications and thus research uses different austempering heat treatments (tempering temperature: 20...

It is well known that pressure causes profound changes in the properties of atoms and chemical bonding, leading to the formation of many unusual materials. Here we systematically explore all stable calcium carbides at pressures from ambient to 100 GPa using variable-composition evolutionary structure predictions using the USPEX code. We find that Ca5C2, Ca2C, Ca3C2, CaC, Ca2C3 and CaC2 have sta...