Titanium diboride (TiB2) is a low-density refractory material belonging to the family of ultra-high temperature ceramics (UHTCs). This paper reports on the production and microstructural and optical characterization of nearly fully dense TiB2, with particular interest to its potential utilization as novel thermal solar absorber. Monolithic bulk samples are produced starting from elemental react...

In this study, the p-type Ga-doped Cu3Sb1−xGaxSe4 compounds were fabricated by melting, annealing, grinding, and spark plasma sintering (SPS). The transport properties of Ga-doped Cu3Sb1−xGaxSe4 compounds were investigated. As Ga content increased, the hole concentration of Cu3Sb1−xGaxSe4 compounds increased, which led to an increase in electrical conductivity. Meanwhile, the Seebeck coefficien...

This paper overviews heterogeneous exothermic reactive systems as they apply to the joining of materials. Techniques that are investigated fall under two general schemes: so-called Volume Combustion Synthesis (VCS) and Self-Propagating High-Temperature Synthesis (SHS). Within the VCS scheme, applications that are considered include Reactive Joining (RJ), Reactive Resistance Welding (RRW), and S...

Spark plasma sintering (SPS) is a highly efficient method for the preparation of α/β-SiAlON ceramics. However, rapid large-scale ceramic components with reliable mechanical properties difficult via SPS due to their near-insulating properties. In this study, high-performance end mill rods large aspect ratios were successfully prepared SPS. Two different types processes (namely vertical-round-rod...

LaCl₃ doped polycrystalline SnSe was synthesized by combining mechanical alloying (MA) process with spark plasma sintering (SPS). It is found that the electrical conductivity is enhanced after doping due to the increased carrier concentration and carrier mobility, resulting in optimization of the power factor at 750 K combing with a large Seebeck coefficient over 300 Μvk-1. Meanwhile, all the s...

Multifunctional materials with more than two good properties are widely required in modern industries. However, some properties are often trade-off with each other by single microstructural designation. For example, nanostructured materials have high strength, but low ductility and thermal stability. Here by means of spark plasma sintering (SPS) of nitrided Ti particles, we synthesized bulk cor...

Dense (>98 th%) and homogeneous ceramic/metal composites were obtained by spark plasma sintering (SPS) using ZrO2 and lamellar metallic powders of tantalum or niobium (20 vol.%) as starting materials. The present study has demonstrated the unique and unpredicted simultaneous enhancement in toughness and strength with very high flaw tolerance of zirconia/Ta composites. In addition to their excel...

Cr-incorporated UN (Cr-UN) composite fuels with different Cr amounts up to 10 wt% are fabricated by spark plasma sintering, and their microstructure phase heterogeneity analyzed. Highly densified homogeneous distribution identified for the pellets, demonstrating a liquid sintering characteristic enriched on grain boundaries. A ternary U2CrN3 forms in Cr-UN matrix of 5 wt%. The SPS pellets displ...

High-entropy alloy AlCrFeCoNi powder with a metastable body centered cubic (bcc) structure is produced by inert gas atomization. This state largely preserved after processing the high-velocity-oxygen-fuel (HVOF) thermal spraying. A heat treatment conducted objective to form duplex comprising ductile face (fcc) phase. The formation of an additional fcc phase accompanied decrease in hardness and ...

In this study, in situ composite was manufactured by using TiB2 matrix and C3N4 additive through spark plasma sintering. The optimum SPS parameters were considered the process carried out at a temperature of 1900°C for 7 minutes applying an external pressure 40 MPa. thermodynamics possible reactions during investigated. products chemical identified. complementary XRD investigations, EDAX analys...