The growth patterns of chromium diboride thin films deposited by thermal evaporation on borosilicate glass, fused silica, single crystal Si and Cu substrates are reported. It is shown that the adhesion of films is best on Cu, whereas on the other substrate films of thickness of > 200 nm are not ...

Friction and wear behaviour of the hot pressed monolithic chromium diboride (CrB2) of 94% theoretical density were studied at different loads (3, 5 and 10 N) and frequencies (10 and 15 Hz) under dry reciprocative sliding condition against cemented tungsten carbide (WC–Co) ball. Coefficient of f...

Sinterability of monolithic CrB2 was investigated under pressureless sintering condition using spark plasma sintering facility (SPS). Monolithic chromium diboride (CrB2) was sintered in a modified die setup instead of traditional/conventional plunger and die assembly. This kind of assembly creat...

Spark plasma sintering (SPS) experiments were conducted to investigate the effect of the processing parameters such as temperature, mechanical pressure and dwell time on densification behavior of monolithic chromium diboride. The sintering experiments were performed at different temperatures ran...

This study reports on mechanical properties of borided pure tungsten. Boronizing heat treatment was performed in a solid medium consisting of Ekabor powders at 940 °C for 2, 4, and 8 h. The presence of WB on the surface of pure tungsten was confirmed by XRD analysis. Metallographic studies reve...

Tungsten borides are known to be very hard and metallic materials. Tungsten monoboride, WB, becomes superconducting at Tc = 4.3 K in the tetragonal modification and Tc = 2.8 K in the orthorhombic modification. The structures of the two WB modifications were revised based on X-ray and neutron pow...

The application of diamond coatings for strengthening cemented tungsten carbide has been previously attempted, but suffers from delamination. Plasma enhanced chemical vapor deposition boriding improves the strength of cemented carbides by forming WCoB, W2CoB2, and/or CoB phases using controllabl...

The most promising areas of research of new super-hard materials are transition metal borides. These materials are one of the candidates for future superhard layers that will be competitive to DLC and c-BN layers. In this paper MoB-type tungsten boride (WB) layers were examined. WB layers have b...

Mechanically-induced self-sustaining reactions (MSRs) in WO3B2O3MgC powder mixtures were investigated in terms of reductant content. Also, two different predictive intelligent-based techniques including Adaptive Neuro-Fuzzy Inference System (ANFIS) and Multi-Layer Perceptron Artificial Neural Ne...

Arc plasma melting of WC+B4C followed by an in situ furnace cooling produced a multi-phase composite consisting of tungsten carbide, tungsten boride and carbon. The melt-cast product was prepared in six different compositions by varying the boron carbide content (within 1–15 wt%) at the charge ...

Tungsten and boron compounds belong to the group of superhard materials since their hardness could exceed 40 GPa. In this study, the properties of the tungsten boride WBx coatings deposited by radio frequency magnetron sputtering were investigated. The sputtering was performed from specially pre...

Tungsten borides belong to the group of potentially superhard materials which hardness could be compared to cubic boron nitride and diamond. However, difficulty in fabrication of single phase material using conventional methods is the main drawback of this group of ceramics. In order to overcome...

During the recent years, microarray analysis of gene expression has become an inevitable tool for exploring toxicity of drugs and other chemicals on biological systems. Therefore, toxicogenomics is considered as a fruitful area for searching cellular pathways and mechanisms including cancer, imm...

In this research, the self-propagating high-temperature synthesis characteristics of the 2WO3‒(1 + x)B2O3‒(9 + y)Mg system were studied using H3BO3 as the boron oxide source. The addition of extra B2O3 and Mg was considered as the main process parameter to obtain tungsten borides phases. XRD res...

Titanium-based discontinuously reinforced metal matrix composites were obtained by mechanical alloying and spark plasma sintering. Titanium sponge was used as a raw material to minimize costs, and a small amount of calcium was added as a process control agent. α and β Titanium matrices were ob...

A CALPHAD-guided alloy design strategy is used here to design and process fully dense titanium boride (TiB) ceramic alloys containing a ductile phase for toughening. This involved the construction of high temperature phase fields of the Ti-B-Fe-Mo quaternary alloy system using the CALPAHD approa...

The nature of growth of hard surface layers consisting of a titanium diboride (TiB2) layer and a titanium boride (TiB) whisker layer on titanium, and the kinetics have been critically examined. High density of nanostructured TiB whiskers have been found to form in the sub-layer in most condition...

The work was devoted to study of microstructure and mechanical properties of discontinuously reinforced composite materials based on near-α Ti/TiB and near-α Ti/(TiB+TiC) fabricated in situ by casting. A near-α titanium alloy VT18U (Ti-6.8Al-4Zr-2.5Sn-1Nb-0.7Mo-0.15Si) was used as a matrix ma...

This paper presents the experimental data on the synthesis of titanium diboride (TiB2) fine dispersed powder carried out in laboratory scale. TiB2 powder was prepared by the reduction of titanium dioxide with boron carbide and nanofibrous carbon in an argon atmosphere. The powders of TiB2 were c...

This study presents results of selective laser melting (SLM) processing of in situ Ti–TiB composites from optimally milled Ti–TiB2 powder. Optimized tuning of the SLM manufacturing parameters was applied to obtain almost fully dense (>99.5%) Ti–TiB composites. X-ray diffraction and electron d...