[PDF] Top 20 Production of a nanostructured copper by Spark Plasma Sintering

... Spark plasma sintering (SPS) is a recent pressure assisted sintering technique characterized by a fast heating rate, short sintering time and a relatively low sintering ... See full document

... MMCs were firstly developed to increase strength and elastic moduli of light metals for aerospace applications (Pagounis et al., 1998). At the beginning aligned continuous fibres were used as reinforcement, but later ... See full document

... The need for nanoparticles can be sought in the properties that they would show in solar cells. For randomly generated charge carriers, in fact, the average diffusion time (τ) from the bulk to the surface is given by τ = ... See full document

... pressure is applied. The different value of electrical resistance at the beginning of SPS is associable to the particle size of the milled powders and to the presence of copper oxide. It has been demonstrated that ... See full document

... Bulk nanocrystalline metals and alloys can be produced by high energy milling of powders and their consolidation by sintering techniques characterized by a low thermal load in order to minimize grain growth. This ... See full document

... the production of many materials that are otherwise difficult to produce by other sintering ...reduces sintering times from hours to ...lower sintering temperatures, 66 improved mechanical ... See full document

... Abstract Due to internal processing defects, bulk nanostructured Mg alloys have high strength but extremely poor ductility. A novel and facile process was designed and in-situ powder casting was initiated during ... See full document

... conventional sintering methods and which suffer for a large thermal ...typically nanostructured metal powders, intermetallic powders and metal matrix composites (MMC) where, the powders are very hard and a ... See full document

... contain copper. Copper matrix composites are one of the most important and technical materials with extensive applications in structures, heat management, aerospace and ...automobiles. Copper matrix ... See full document

... Bulk nanostructured magnesium alloy AZ31 has been produced by spark plasma sintering at four different temperatures from 350 to 450 ...of sintering temperature on microstructural ... See full document

... The exception here is the sample obtained at 700 °С, for which the absence of carbon on the X-ray image is, probably, related to its low content and highly dispersed state. The emergence of free carbon in SPS- composites ... See full document

... the spark plasma sintered samples.For TH sample which had no sintering aid, the relative density hardly surpassed 94 % TD, while for CNTs containing one (THC) it reached to ... See full document

... the spark plasma sintering (SPS) method, hydroxyapatite (HAp) material was densified using a hydroxyapatite powder (RND Korea, 45 ㎛, purity 98 ... See full document

... and spark plasma ...and spark plasma sintering can improve the thermoelectric performance of PbTe bulk samples due to an increased potential barrier and phonon scattering at grain ... See full document

... the spark plasma sintering method utilizes uniaxial pressure along with a pulsed electric current in one ...high-temperature plasma generated by spark discharges in voids between ... See full document

... Figure 4 shows (a) a grain size map and (b) a phase map combined with the misorientation map by EBSD. Figure 4(a) was based on EBSD data collected from an area of 260 © 230 µm with a resolution of 250 nm, in a typical ... See full document

... the compacted body. A sintering temperature of 1273 K was selected to achieve as high a densification as possible prior to decomposition. The crystal phases were almost the same as that of calcined powders, but Ir ... See full document

... by spark plasma ...electrical sintering technique, which applies a pulsed DC voltage and current to the ...the sintering time to attain its full ... See full document

... temperature, sintering and mechanical intensity was insuffi- ...the sintering at higher ...by Spark Plasma Sintering (SPS) and its mechanical properties and biocom- patibility were ... See full document

... However, the electrical and thermoelectric properties were studied mainly at low temperatures by using single crystals. No study on thermoelectric properties of polycrystalline Sr- Ru-O compounds was reported. This may ... See full document