14th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing: Sustainable Processing of Ceramics and Composites II
Sponsored by: ACerS Engineering Ceramics Division
Program Organizers: Surojit Gupta, University of North Dakota; Mritunjay Singh, Ohio Aerospace Institute; Tatsuki Ohji, National Institute of Advanced Industrial Science and Technology; Hisayuki Suematsu, Nagaoka University of Technololgy; Enrico Bernardo, University of Padova; Rajiv Asthana, University of Wisconsin; Yiquan Wu, Alfred University; Zhengyi Fu, Wuhan University of Technology; Allen Apblett, Oklahoma State University
Wednesday 8:00 AM
October 12, 2022
Room: 414
Location: David L. Lawrence Convention Center
Session Chair: Yiquan Wu, Alfred University; Enrico Bernardo, University of Padova; Allen Apblett, Oklahoma State University; Jie Yin, Shanghai Institute of Ceramics Chinese Academy of Sciences
8:00 AM
Substrate Orientation and Rare-earth Doping Effects on the Bandgap Engineering of Epitaxial β-(AlxGa1-x)2O3 Films: Iva Milisavljevic1; Yiquan Wu1; 1Alfred University
Wide bandgap materials such as β-Ga2O3 have been receiving significant research attention in the recent period due to their high number of potential applications in electronic and optoelectronic devices. By alloying β-Ga2O3 with elements such as Al, the bandgap can be further increased, enabling new possible applications of β-(AlxGa1-x)2O3 compounds in ultra-high-power electronics, ultra-short wavelength optoelectronics, and others. In this work, the sol-gel spin coating approach has been applied in the fabrication of β-(AlxGa1-x)2O3 epitaxial films with different Al concentrations on Al2O3 single-crystal (sapphire) substrates. Through the comprehensive analysis of the structural, chemical, and optical properties, the effect of Al concentration, rare-earth doping, and substrate orientation (including c-, a-, and r-sapphire substrates) on the bandgap tuning of the prepared films was discussed. The obtained results demonstrate the sol-gel spin-coating technique's great potential for fabricating epitaxial β-(AlxGa1-x)2O3 film with engineered bandgap energies.
8:20 AM Invited
Low Temperature Molten Salt and Microwave Co-assisted Synthesis of Advanced Ceramics for Demanding Applications: Shaowei Zhang1; 1University of Exeter
In this presentation, the main work at Exeter on molten salt and microwave co-assisted synthesis of advanced ceramics in various forms (single phase or composite nanoparticles, 1-D/2-D nanomaterials, hollow nanospheres, and functional coatings) for various demanding applications, is overviewed. It starts with a brief background introduction to the advanced ceramics used in various demanding applications including hypersonic vehicles, armours, high temperature furnace linings, high efficiency engines, and nanocatalysts, which is followed by highlighting the two important mechanisms involved in the molten salt synthesis process, “template-growth” and “dissolution and precipitation”. Then, several interesting case studies on applications of the two main mechanisms to the synthesis of complex oxide (e.g., spinels, zirconates and titanates) and non-oxide ceramics (in particular, carbides and borides) are presented. Next, the use of molten salt combined with microwave heating in the advanced ceramic synthesis is discussed in detail. And finally, the future perspectives are given.
8:50 AM Invited
New Construction Materials from Engineered Alkali Activation of Waste Glasses: Giulia Tameni1; Hamada Elsayed1; Akansha Mehta2; Jozef Kraxner2; Loredana Contrafatto3; Enrico Bernardo1; 1University of Padova; 2Funglass, University of Trencin; 3University of Catania
Sustainable development comprises actions to reuse glass fractions not recycled in the original articles, including the obtainment of new binders, according to alkali activation, in turn causing partial dissolution of fine powders and condensation of surface products. Gels with a stable network structure are formed by selection of waste glass. As an example, calcium-free boro-alumino-silicate glass, from dismantled pharmaceutical vials, with alkali hydroxide solutions at low molarity (not exceeding 3 M). The attack promotes glass hydration, followed by condensation, with limited alkali inclusion in the gel, owing to their separation as soluble carbonates. Soda-lime glass, prone to formation of less stable hydrated calcium silicates, leads to stable gels when coupled with natural glassy materials, in form of volcanic ash. Glass-derived binders exhibit a strength-to-density ratio comparable to that of gypsum and lightweight concrete and offer a distinctive end-of-life option, being converted into highly porous glass and glass-ceramic foams upon firing.
9:20 AM
Effect of RHA Biochar Calcination on Structural, Thermal, and Morphological Properties of BaO-B2O3-SiO2 Glass System-based Coatings: Nurullah Copoglu1; Bugra Cicek1; 1Yildiz Technical University
The effect of incorporating rice husk ash (RHA) as a silica alternative in glass coatings for metal surfaces was addressed in this work. The chemical composition of RHA particles with the highest percentage of SiO2 ratio is chosen for the melting process after they have been calcined for various durations and temperatures. The SiO2 source is generated from both calcined RHA and virgin RHA in the batch of BaO-B2O3-SiO2 glass system. Parent glasses were made using traditional melt-quench procedure at 1200°C for 30 minutes. Glass powder was successfully coated on a steel surface, which was subsequently thermally treated at 810°C for 4 min. The structural, morphological, and thermal properties of the coatings were investigated using XRD, FTIR, SEM, and thermal microscopy, respectively. It has been discovered that calcination is required to achieve an amorphous structure with no residual phases.
9:40 AM
Application of Animal Bone Residue as Portland Cement Concrete Ingredient: Frederico Margem1; Gabriel Gonçalves1; Ismael Boechat1; Patrick do Nascimento1; Ruthy da Silva1; 1Uniredentor
One of the main alternatives to retard the resource extinction process in ceramics is the replacement of concrete components by alternative materials that can reduce costs and positively influence the performance of the mixture. This work proposed the use of a kind of bone pounder in concrete, aiming at a positive influence on its workability and/or on its compressive strength. The residue used replaced the binder in percentages of 2%, 5% and 8% on a standard conventional concrete obtained by the ABCP method. Tests were performed to characterize both the usual components of the concrete and the bone pounder. Were used the slump of the truncated cone to verify the viability of the concrete, water absorption, apparent specific mass and compressive strength. As results it could be considered the waste as an applicable alternative in partial replacement of Portland cement in concrete.
10:00 AM Break
10:20 AM Invited
Rapid Fabrication of SiC Composites by Selective Laser Sintering and Direct Liquid Silicon Infiltration: Jie Yin1; Xuejian Liu1; Zhengren Huang1; 1Shanghai Institute of Ceramics Chinese Academy of Sciences
In this work, a novel strategy for fabricating SiC composites via selective laser sintering (SLS) of carbon fiber combined with liquid silicon infiltration is reported. The SLS-powder composed of chopped carbon fiber (Cf) and phenolic resin (PR) mixed powder, in addition to a Cf/PR green body with a tailored microstructure was obtained by SLS. The printed green body with a low PR content (25vol%) is found to exhibit high printing stability and excellent strength. Finally, high-performance SiC composites are prepared via the liquid silicon infiltration, the density, flexural strength, elastic modulus, and fracture toughness being 2.719±0.008 g/cm3, 266±5 MPa, 248±3 GPa, and 2.87±0.07 MPam1/2, respectively. This strategy demonstrates an efficient approach to near-net shape high performance SiC composites with a designable complex structure.
10:50 AM
Design and Development of Novel Structural Materials from Biomass: Surojit Gupta1; 1University of North Dakota
Biomass is a abundant, sustainable and renewable resource for generating functional materials. In this presentation, I will present some of the development in my research group in designing functional materials from biomass. The presentation will be divided in two parts. During part-A, I will present research on the design of sustainable polymers and plastics from biomass. During part-B, I will present some ideas about greening of ceramics manufacturing. Detailed microstructure and characterization of these materials will be presented. It is expected that these materials can be used in different commercial applications.