A5074021531- Metallic Glasses and Amorphous Alloys
- Aluminum Alloys Composites Properties
- Advanced materials and composites
- Phase-change materials and chalcogenides
- Glass properties and applications
- Advanced ceramic materials synthesis
- Quasicrystal Structures and Properties
- High Entropy Alloys Studies
- Iron and Steelmaking Processes
- Computational Drug Discovery Methods
- Metal Extraction and Bioleaching
- Sepsis Diagnosis and Treatment
- Microstructure and mechanical properties
- Intermetallics and Advanced Alloy Properties
- Thermochemical Biomass Conversion Processes
- Metal Alloys Wear and Properties
- Titanium Alloys Microstructure and Properties
- Statistical Methods in Clinical Trials
- melanin and skin pigmentation
- Mineral Processing and Grinding
- Cellular and Composite Structures
- Global Maternal and Child Health
- Neonatal and Maternal Infections
- Pharmacogenetics and Drug Metabolism
- Electromagnetic wave absorption materials
Hanoi University of Science and Technology
2014-2024
Vietnam National University Ho Chi Minh City
2024
University Medical Center HCMC
2024
Children's Hospital 2
2024
Ho Chi Minh City Medicine and Pharmacy University
2024
University of Ulsan
2006-2007
Ulsan University Hospital
2006
University of Washington
1998
We have identified three new members of the olfactory receptor (OR) gene family within a large segment DNA that is duplicated with high similarity near many human telomeres. This present at 3q, 15q, and 19p in each 45 unrelated humans sampled from various populations. Additional copies are polymorphically 11 other subtelomeric locations. The frequency which block some locations varies among While carry seven to OR-containing block, it located chimpanzee gorilla predominantly single site, not...
This study focuses on the fabrication and microstructural investigation of Cu–TiH2–C Cu–Ti–C nanocomposites with different volume fractions (10% 20%) TiC. Two mixtures powders were ball milled for 10 h, consequently consolidated by spark plasma sintering (SPS) at 900 1000 °C producing bulk materials relative densities 95–97%. The evolution process TiC formation during was studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission (HRTEM). XRD...
In this work, TiC–Cu composites containing 20 and 30 vol % of nano-sized titanium carbide (TiC) particles were prepared by powder metallurgy using copper powders with micrometer-sized nanometer-sized particles. Mixtures TiC Cu ball milled for 10 h spark plasma sintered at 800–900 °C under an applied pressure 50 MPa. The relative density the was 95.0%–96.5%. fractured in a ductile mode. crystallite size matrix smaller than that powder, which confirmed transmission electron microscopy (TEM)....
The initial as-cast microstructure of high-chromium white cast iron (2.08% C, 12.1% Cr), including austenitic dendrites in a matrix eutectic mixture austenite and M7C3 carbides. Heat treatment leads to transformation the from martensite phase. secondary M23C6 carbide precipitated improving hardness sample 48 HRC 62 HRC. JMatPro simulations volume fraction phase for Fe-C-Cr-Mn alloy shows phases are stable at austenitization temperature (1000 °C). Eutectic is which undissolved during heat...
Al82Fe16Ce2 and Al82Fe14Mn2Ce2 amorphous alloys were successfully synthesized by the mechanical alloying technique. The microstructural evolution of milled powders was thoroughly investigated employing X-ray diffraction (XRD) scanning electron microscopy (SEM). Additionally, their magnetic properties quantitatively evaluated a vibrating sample magnetometer (VSM). A full structure obtained for both after milling 40 h. During initial stage, extending from 5 to 20 h, an fcc solid solution phase...
The demand for advanced Al-based alloys with tailored structural and magnetic properties has intensified applications requiring a high thermal stability performance under challenging conditions. This study investigated the phase evolution, properties, stability, microstructural changes in Al82Fe16Nb2 Al82Fe14Nb2Mn2, synthesized via mechanical alloying (MA), using stearic acid as process control agent. X-ray diffraction results indicated that achieved β-phase solid solution 13–14 nm...
Al-Fe-Y amorphous alloys of Al 8 4 Fe 1 6 , 82 18 and 16 Y 2 composition were prepared by mechanical alloying in a planetary ball mill P100. A nearly complete amorphization could be achieved for the powder after 100h milling at rotational speed 350 rpm hexane medium. Differential scanning calorimetry (DSC) analyses revealed three-stage crystallization processes four-stage alloy, respectively. Taking into account DSC data, thermal stability increased order composition. The alloy exhibited...
In this work, the effect of a slight change in composition Al-Fe amorphous alloys (from Al 84 Fe 16 to 82 18 ) and substitution Y for (2 at.%) on their crystallization kinetics was studied. According X-ray diffraction analysis, powders , 2 with fully structure were formed after 100 h mechanical milling mixtures elemental powders. The behavior also studied by transmission electron microscopy. Upon heating up temperature first exothermic peak, α -Al crystals precipitated from matrix. During...
In the present study, thermal stability and crystallization behavior of mechanical alloyed metallic glassy Al82Fe16Ti2, Al82Fe16Ni2, Al82Fe16Cu2 were investigated. The microstructure milled powders was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential calorimetry (DSC). results showed remarkable distinction in alloys varying only two atomic percentages transition elements. Among them, Al82Fe16Ti2 alloy shows highest compared to others. process,...
In this paper, the influence of mechanical milling on microstructural evolution and magnetic properties Al82Fe14Ni4 alloys prepared by alloying is investigated. The elemental powder mixture was processed under argon gas at 250 rpm 350 using a planetary ball mill. particles experienced severe deformation, fragmentation mutually cold-welding during collisions balls. diffraction peaks Al, Fe Ni phases gradually disappeared process, halo peak corresponding to amorphous phase formed....
The mechanically alloyed Al82La10Ni4Fe4 glassy powder displays a two-step devitrification characterized by the precipitation of fcc-Al together with small amounts intermetallic Al11La3 phase in first crystallization. interface-controlled growth mechanism governed crystallization event. Calculations activation energy, using methods Kissinger, Ozawa, and Augis-Bennett gave values 432.33, 443.2, 437.76 kJ/mol, respectively. calculated Avrami exponent (n) for peak was about 1.41, suggesting an...
In this study, ex-situ Cu-TiC nanocomposites of 1, 3 and 5 vol. % TiC in-situ Cu-TiH2-C (corresponding to TiC) were prepared using ball milling spark plasma sintering methods. Powder mixtures milled for 4 h at 400 rpm. As-milled composite powders consolidated under an applied pressure 70 MPa. The phase composition, microstructure the samples characterized by X-ray diffraction, scanning electron microscope transmission techniques, respectively. With increasing content from 1 %, hardness...
In this study, Cu-TiC nanocomposites were fabricated from a mixture of Cu and 5÷15% wt. TiC powders by ball milling subsequent spark-plasma sintering. The morphology nanocomposite observed field emission scanning electron microscopy. Only characteristic peaks phases detected X-ray diffraction patterns milled powder mixture. Sintered compacts showed highly densified (∼95% relative density) while retaining fine grains in the matrix. hardness, wear resistance, fracture surface sintered...
Al-La-Ni-Fe alloys of three different compositions (Al82La10Ni4Fe4, Al85La9Ni3Fe3 and Al88La6Ni3Fe3) were prepared high-energy milling in a planetary ball-mill (AGO-2). Complete amorphization was observed for the Al82La10Ni4Fe4 alloy after 350 h at rotational speed 300 rpm. In contrast, Al88La6Ni3Fe3 powders contained FCC Al phase even prolonged milling. The tendency found to increase order < Al82La10Ni4Fe4, which may well be ascribed increasing atomic size mismatch constituent elements...
Introduction: The traditional approach to neonatal early-onset sepsis (NEOS) management, involving maternal risk factors and nonspecific symptoms, usually leads unnecessary antibiotic use. This study addresses these concerns by evaluating the Kaiser calculator (KSC) in guiding therapy for NEOS, especially high-incidence facilities (over 4/1,000 live births), comparing it against 2010 Centers Disease Control Prevention (CDC) guidelines neonates ≥34 weeks with suspected sepsis, thereby...
In this work, a mixture of mill scale with 5 wt% molasses as binder was pressed under pressure 200 MPa to prepare briquettes. The reduction process performed at the temperature 1000, 1050, 1100, 1150 and 1200 °C in bed A3 fine coal reductant. degree evaluated time duration 15, 30, 45, 60, 90 150 minutes, after furnace reached predetermined temperature. highest is 94.7% °C. Reaction rate constant ( k ) increased from 4.63×10 -4 5.03×10 -3 min -1 when 1000 apparent activation energy reaction E...
In the present study, structure evolution under direct reduction of a Minh-Son magnetite iron ore/carbon composite pellets in microwave-heating kiln different microwave wattage 60 and 90 % (with firing time from 15 to 120 min.) was investigated. The microstructure characterized by scanning electron microscopy coupled with energy dispersive spectroscopy X-ray diffraction (XRD). phase formation indexed using MDI Jade peaks matching reference sample. At microwave’s %: wustite (FeO) has appeared...
The present work is focused on the fabrication and investigation of microstructures copperbased TiC nanocomposites produced by mechanical milling in a high energy planetary ball mill. TiH 2 , carbon copper powders were used as starting materials which In-Situ reaction between occurs to form nanoparticles. mixture Cu–TiH –C milled for 12 h at 450 rpm Argon gas. Annealing treatment process 950 °C was applied as-milled composite enhance reaction. consolidation conducted spark plasma sintering...