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Showing 1 to 14 of 14 for “"Cryomilling"”.
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Metal based reactive nanocomposites prepared by cryomilling
… milling at the liquid nitrogen temperatures, or cryomilling, which enables mixing aluminum with materials that are unstable or difficult to process at room temperatures. Two types of composite materials are prepared and characterized: Al-I2 and Al-hydrocarbon (where wax, low density polyethylene …
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Cryomilling and Spark Plasma Sintering of 2024 Aluminium Alloy
… milled in slurry formed with liquid nitrogen. Cryomilling takes advantage due to low temperature of the liquid nitrogen that either suppresses or limits recovery and recrystallization and leads to finer grain structure faster. In addition cryogenic milling does not require use of process …
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Cryomilling of Aluminum-based and Magnesium-based Metal Powders
… Ball milling at cryogenic temperatures (cryomilling) is more effective in this capacity due to the low temperature by slowing recovery and minimizing diffusion distances between different components. Nanostructured metals are of interest because of their unique physical and mechanical …
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Deformation mechanisms in bulk nanostructured aluminum obtained after cryomilling and consolidation by spark plasma sintering
… (nc)/ultrafine (UF) aluminum was produced after cryomilling and spark plasma sintering consolidation process. The samples obtainedwere plastically deformed in uniaxial compression. We show that there is a significant fraction of plastic strain (11%) that can be recovered after unloading. …
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Development and evaluation of a beta-glucan biopolymer formulation of lactoferrin produced using a novel cryomilling technique
Transformation of therapeutic proteins from the new compound stage to a marketed product for clinical use depends on the development of an appropriate formulation, using technologies that avoid the underlying causes of protein degradation. Although synthetic biodegradable polymers have been …
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Fingerprinting analysis of non-crystalline pharmaceutical compounds using high energy X-rays and the total scattering pair distribution function
… that amorphous forms created by spray drying and cryomilling a proprietary compound have the same local structure. Finally, we quantified the phase fractions of polymorphic and amorphous components in a sample of the antibiotic sulfamerazine that was recrystallizing from a cryomilling-induced …
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COLD SPRAYED COATINGS WITH DUAL NANOPARTICLE REINFORCEMENTS FOR WEAR AND CORROSION PROTECTION
… six composites were fabricated through cryomilling and then applied to an aluminum substrate as a cold sprayed coating. Using nano-boron carbide (nB4C) and boron nitride nanoplatelets (BNNP) at various combinations up to 2 vol%, an increase of 11.59% in hardness from the control was …
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Production of a nanostructured copper by Spark Plasma Sintering
… The nanostructured powder was produced by cryomilling an atomized powder, using a ball-to-powder ratio of 30:1 for 8h; it has a mean grain size of 19±2 nm and shows quite a high thermal stability, as shown by a DSC investigation. The influence of temperature, particle size, pressure on the …
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Development and analysis of aluminum-PTFE reactive composite material
… Al-PTFE (90-10 wt. %) is prepared through Cryomilling and is shown to be a better method of preparation as compared to room temperature milling. The prepared materials are studied to identify best conditions. The analysis methods include thermal studies both aerobic and anaerobic, Mass …
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Grain Boundary Pinning Approach for Manufacturing High-Strength Nanocrystalline Aluminum Alloys
… in crystallite size with the increase in cryomilling duration. Thereafter, the bulk samples using cryomilled powders were manufactured using two different methods (a) spark plasma sintering and (b) cold spray processes. The mechanical properties of the bulk samples were assessed by …
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Grain size effects on the fatigue response of nanocrystalline materials
… using alternate processing techniques such as cryomilling and equal channel angular pressing.
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Sintering behavior of Ag-Sn alloys prepared via cryogenic high-energy ball milling
… were studied ranging from 6-15at%Sn. Cryomilling is shown to extend the solid solubility of Sn in Ag from 8 to 15.4at% at room temperature, as well as produce anomalous Bragg peak shifting attributed to the presence of stacking faults and dislocation loops. These alloys prove to sinter …
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Characterizing the Effects of Mechanical Alloying on Solid State Amorphization of Nanoscaled Multilayered Ni-Ti
… preexisting defects in the powders caused by cryomilling. Serial 3D reconstruction of cryomilled Ni-Ti powders was done by scanning electron microscopy and focused ion beam. Through 3D reconstruction it was observed that a random and non-linear lamella structure has been formed in cryomilled …