RETRACTED: Vorotilo et al. Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder. 2020, , 1261.

The Editorial Office retracts the article, "Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder" [...

Structure and Properties of Zr-Mo-Si-B-(N) Hard Coatings Obtained by d.c. Magnetron Sputtering of ZrB-MoSi Target.

Coatings in a Zr-Mo-Si-B-N system were deposited by the magnetron sputtering of ZrB-MoSi targets in argon and nitrogen. The structure of the coatings was investigated using scanning electron microscopy, X-ray diffraction, energy-dispersive spectroscopy, and glow-discharge optical emission spectroscopy. Mechanical and tribological properties were measured using nanoindentation and pin-on-disc testing.

Extremely hard and tough high entropy nitride ceramics.

Simultaneously hard and tough nitride ceramics open new venues for a variety of advanced applications. To produce such materials, attention is focused on the development of high-entropy ceramics, containing four or more metallic components distributed homogeneously in the metallic sublattice. While the fabrication of bulk high-entropy carbides and borides is well established, high-entropy nitrides have only been produced as thin films.

Effect of In Situ Grown SiC Nanowires on the Pressureless Sintering of Heterophase Ceramics TaSi-TaC-SiC.

To ascertain the influence of SiC nanowires on sintering kinetics of heterophase ceramics, two composite powders (TaSi-TaC-SiC and TaSi-TaC-SiC-SiC) are fabricated by mechanically activated combustion synthesis of Ta-Si-C and Ta-Si-C-(CF) reactive mixtures. Remarkable compressibility is achieved for the TaSi-TaC-SiC-SiC composition (green density up to 84% as compared with 45.2% achieved for TaSi-SiC-TaC) which is attributed to the lubricating effect of residual adsorbed fluorinated carbon (most likely CF).

Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder.

Reactive powder composites Cu-(0-15%)TiH containing up to 5% native CuO were manufactured by high energy ball milling and then hot-pressed to produce bulk nanostructured copper-matrix alloys reinforced by CuTiO inclusions. Two high-energy ball-milling (HEBM) protocols were employed for the fabrication of Cu-Ti alloys: single-stage and two-stage ball milling, resulting in an order of magnitude refinement of TiH particles in the reactive mixtures. Single-stage HEBM processing led to the partial retention of Ti in the microstructure of hot-pressed specimens as the α-Ti phase and formation of fine-grained (100-200 nm) copper matrix interspersed with 5-20 nm CuTiO precipitates, whereas the two-stage HEBM led to the complete conversion of TiH into the CuTiO phase during the hot pressing but produced a coarser copper matrix (1-2 μm) with 0.