Characterization of a Fe-Based Alloy System for an AFCI Metallic Waste Form

2009 ◽  
Author(s):  
Mark J. Williamson ◽  
Robert L. Sindelar
Keyword(s):  
Waste Management ◽  
Management Strategy ◽  
Alloy System ◽  
Management Program ◽  
Waste Form ◽  
Vacuum Induction Melting ◽  
Phase Assemblage ◽  
Induction Melting ◽  
High Level

The AFCI waste management program aims to provide a minimum volume stable waste form for high level radioactive waste from the various process streams. The AFCI Integrated Waste Management Strategy document has identified a Fe-Zr metallic waste form (MWF) as the baseline alloy for disposal of Tc metal, undissolved solids, and TRUEX fission product wastes. Several candidate alloys have been fabricated using vacuum induction melting to investigate the limits of waste loading as a function of Fe and Zr content. Additional melts have been produced to investigate source material composition. These alloys have been characterized using SEM/EDS and XRD. Phase assemblage and specie partitioning of Re metal (surrogate for Tc) and noble metal FP elements into the phases is reported.

scholarly journals Immobilization in Ceramic Waste Forms of the Residues From Treatment of Mixed Wastes

1993 ◽  
Vol 333 ◽  
Author(s):  
V. M. Oversby ◽  
R. A. Van Konynenburg ◽  
W. E. Glassley ◽  
P. G. Curtis
Keyword(s):  
Waste Management ◽  
Treatment Process ◽  
Waste Form ◽  
Phase Assemblage ◽  
Technology Program ◽  
Ceramic Phase ◽  
Waste Forms ◽  
Starting Point ◽  
Treatment Technologies ◽  
Inorganic Waste

ABSTRACTThe Environmental Restoration and Waste Management Applied Technology Program at LLNL is developing a Mixed Waste Management Facility to demonstrate treatment technologies that provide an alternative to incineration. As part of that program, we are developing final waste forms using ceramic processing methods for the immobilization of the treatment process residues. The ceramic phase assemblages are based on using Synroc D as a starting point and varying the phase assemblage to accommodate the differences in chemistry between the treatment process residues and the defense waste for which Synroc D was developed. Two basic formulations are used, one for low ash residues resulting from treatment of organic materials contaminated with RCRA metals, and one for high ash residues generated from the treatment of plastics and paper products. Treatment process residues are mixed with ceramic precursor materials, dried, calcined, formed into pellets at room temperature, and sintered at 1150 to 1200°C to produce the final waste form. This paper discusses the chemical composition of the waste streams and waste forms, the phase assemblages that serve as hosts for inorganic waste elements, and the changes in waste form characteristics as a function of variation in process parameters.

scholarly journals Development of a Better Solid Waste Management Program for Sustainable Development in a Residential Subdivision

2021 ◽  
Vol 2 (11) ◽  
pp. 1008-1020
Author(s):  
Antoniette M. Almaden
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Management Strategy ◽  
Solid Waste Management ◽  
Management Program ◽  
Descriptive Research ◽  
Effective Option ◽  
Survey Results ◽  
Status Classification ◽  
Recycled Waste

Proper implementation of Solid Waste Management (SWM) is an essential part for the protection of the residents’ health, safety and environmental quality. SWM methods have been adapted by many residential subdivisions into a more practical and effective option to establish sustainability based on the reduce, reuse, and recycle principles. This study aims to contribute a solution to the challenging operation of solid waste management in Modena Mactan subdivision (1) to comprehensively describe the homeowner’s status classification and demographic characteristics, (2) to evaluate volume of waste produced and recycled waste revenue collected, (3) to recognize homeowner’s perception on the current waste management status, and (4) to showcase feasible approaches for sustainable waste management program. The study applied the descriptive research design and was carried out to 93 homeowners who went through the (house-to-house) paper-pencil-questionnaire survey. Results showed that the subdivision produced an average of 33 tons or 16.974 kilograms of solid waste per household per month, and generated an amount of 1,369 PHP or 27.41 USD revenue from the segregated recyclable waste collected from August 1-28, 2021. Moreover, about 87% of the respondents found convenient and sought to change in paperless system. Conclusively, it was revealed that 74% of the respondents found the recycling incentive scheme more inclusive as a feasible approach for waste management strategy to sustain the solid waste management program in Modena Mactan subdivision, Basak, Lapu-Lapu City, Cebu, Philippines.

Processing and characterization of Al–Cu–Li alloy AA2195 undergoing scale up production through the vacuum induction melting technique

2013 ◽  
Vol 576 ◽  
pp. 21-28 ◽  
Author(s):  
Niraj Nayan ◽  
S.V.S. Narayana Murty ◽  
Abhay K. Jha ◽  
Bhanu Pant ◽  
S.C. Sharma ◽  
...  
Keyword(s):  
Scale Up ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Melting Technique

Processing and Characterization of Al-Cu-Li Alloy AA2195

2012 ◽  
Vol 710 ◽  
pp. 119-124 ◽  
Author(s):  
Niraj Nayan ◽  
S.V.S. Narayana Murty ◽  
S.C. Sharma ◽  
K. Sreekumar ◽  
P.P. Sinha
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Solution Treatment ◽  
Inert Atmosphere ◽  
Vacuum Induction Melting ◽  
Induction Melting

The objective of the present study was to melt and cast AA2195 alloy in Vacuum Induction Melting (VIM) under dynamic inert atmosphere. These billets were homogenized and subsequently hot forged and rolled to sheets. The products in the form of sheets were subjected to T8 (Solution Treatment +WQ+CW+Aging) temper condition. Mechanical properties were evaluated at room temperature and correlated with microstructure. Highest mechanical properties obtained in T87 temper have been reported.

scholarly journals Metallurgical Preparation of Nb–Al and W–Al Intermetallic Compounds and Characterization of Their Microstructure and Phase Transformations by DTA Technique

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 2001
Author(s):  
Tomas Cegan ◽  
Daniel Petlak ◽  
Katerina Skotnicova ◽  
Jan Jurica ◽  
Bedrich Smetana ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Intermetallic Compounds ◽  
Intermetallic Phase ◽  
Intermetallic Phases ◽  
Al Alloys ◽  
Vacuum Induction Melting ◽  
Al Alloy ◽  
Induction Melting ◽  
Arc Melting

The possibilities of metallurgical preparation of 40Nb-60Al and 15W-85Al intermetallic compounds (in at.%) by plasma arc melting (PAM) and vacuum induction melting (VIM) were studied. Both methods allow easy preparation of Nb–Al alloys; however, significant evaporation of Al was observed during the melting, which affected the resulting chemical composition. The preparation of W–Al alloys was more problematic because there was no complete re-melting of W during PAM and VIM. However, the combination of PAM and VIM allowed the preparation of W–Al alloy without any non-melted parts. The microstructure of Nb–Al alloys consisted of Nb2Al and NbAl3 intermetallic phases, and W–Al alloys consisted mainly of needle-like WAl4 intermetallic phase and Al matrix. The effects of melting conditions on chemical composition, homogeneity, and microstructure were determined. Differential thermal analysis was used to determine melting and phase transformation temperatures of the prepared alloys.

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