Microstructural And Phase Analysis Of Al Based Bulk Metallic Glass Synthesized By Mechanical alloying And Consecutive Spark Plasma Sintering With Varying Consolidation Pressure  

Ram S. Maurya, Ashutosh Sahu, Tapas Laha*

Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India

Adv. Mater. Lett., 2016, 7 (3), pp 187-191

DOI: 10.5185/amlett.2016.6174

Publication Date (Web): Feb 01, 2016

E-mail: laha@metal.iitkgp.ernet.in

Abstract


In the present work, Al86Ni8Y6 and Al86Ni8La6 powder blends were mechanically alloyed. Al86Ni8Y6 yielded full amorphous structure (150 h); whereas Al86Ni8La6 was partially amorphized after same duration of milling attributed to incomplete dissolution of solute ‘La’ in solvent ‘Al’. DSC experiment showed wider glass transition temperature range of ~ 44 oC (Tx - Tg = 268 oC-224 oC) in Al86Ni8Y6 amorphous powders; whereas no glass transition temperature was detected in Al86Ni8La6 powders. Further, Al86Ni8Y6 amorphous powders were consolidated via spark plasma sintering in the pressure range of 100-400 MPa. XRD and TEM analysis confirmed retention of larger fraction of amorphous phase in higher pressure sintered sample, attributed to suppression of mass transfer diffusion kinetics process. Higher pressure favored short range ordering leading to formation of various intermetallic phases; whereas comparatively faster diffusion in case of low pressure sintering promoted long range ordering forming nanocrystalline FCC-Al. Higher sintering pressure (say 400 MPa) consolidated sample resulted in better densification (~ 99 %) with improved inter-particle bonding and moreover, retention of larger volume fraction (~ 92 vol %) of amorphous phase with intermetallic nano-precipitates. Vickers microhardness test showed improvement in hardness with increasing sintering pressure attributed to higher fraction of retained amorphous phase and better inter-particle bonding.

Keywords

Al based amorphous alloy, mechanical alloying, spark plasma sintering, sintering pressure,microstructural evolution.

Current Issue

Celebrating 10th Years of Diamond Open Access Publishing in Advanced Materials  


Cerebral Oxygenation Studies Through Near Infrared Spectroscopy: A Review


Analysis of Fine Sulfoaluminate Cement by Strength and Thermogravimetric Analysis


Characterization of the Interfacial Surface Energy for Composite Electrical Conduction Measurements using Two Full Range Percolation Threshold Models


Quantitative Detect of Fatigue of Membrane of Erythrocyte in Uniform Shear Field


Ecofriendly-developed Polyacrylic Acid-coated Magnetic Nanoparticles as Catalysts in Photo-fenton Processes


Evaluation of Drug Interactions with Medications Prescribed to Ambulatory Patients with Metabolic Syndrome in Urban Area


Fiber-reinforced Cementitious Composite: Sensitivity Analysis and Parameter Identification 


Evaluation of Drug Utilization Patterns Based on World Health Organization Drug use Indicators at Outpatients Clinics


Are Quantitatively Micro-machined Scaffolds Effective for Cell Technology?


Synthesis and Characterization of Gold Nanoparticles from Lobelia Nicotianifolia Leaf Extract and its Biological Activities


Advanced Oxidations of Tartrazine Azo-dye


Antifungal Activity of Salvia jordanii Against the Oral Thrush Caused by the Cosmopolitan Yeast Candida albicans among Elderly Diabetic Type 2 patients


Previous issues

Advanced Materials Congress Celebrating 10th Years of Establishment

Secure Management of Networked Batteries for Building Integrated Photovoltaics (BIPV) Systems  

The Cause of 100-year Low Carbonated Concrete of the Bridge 

Organic Montmorillonite Intercalated Nano-composites Prevent Post-Surgical Associated Infections

Morphology/tensile Performance Relationship for LLDPE/PP Double Gated Injected Blends

Preparation and Characterization of Nickel Ferrite Nanoparticles via Sol-gel Method

Nitrogen-doped Diamond Nanowire Gas Sensor for the Detection of Methane

Manufacture of Functional Open-cell Al Foams with Recycled Al Scraps using NaCl Ball Space Holder 

Vilsmeier-Haack Transformations under Non Classical Conditions

New Application of Highly Vesicular Basalt from Jabel Isbil Volcano (Dhamar-Rada'a Volcanic Field), Yemen

An Assessment of Tribological Characteristics under different Operating Condition

Functional Bi Coatings as A Perspective Material for Radiation Shields Production against Electron Radiation

Effects of Silica Modified NiFe2O4 on the Dielectric and Electrical Properties of NiFe2O4 filled Poly (methyl methacrylate) Composites

Upcoming Congress

Knowledge Experience at Sea TM