Characterization of TiN−HA nanocomposite developed through rapid microwave sintering route at high temperature Chintam Suresh Kumar, Shivani Gupta, Apurbba Kumar Sharma International Journal of Applied Ceramic Technology, 2025 Titanium is one of the most suitable metals used in medical implants. Titanium alloys and titanium‐based ceramics are widely used in orthodontics and orthopedic applications. In addition, titanium‐based composites are preferred biomaterials for orthopedic applications and bioactive coatings. This work focuses on using relatively stable TiN material for the fabrication of TiN−HA composite through a rapid sintering technique at a process temperature of ∼1400–1450°C in a modified domestic microwave applicator at 800 W power. Microwave sintered nanocomposites were characterized in terms of density, measurement of microhardness, analysis of microstructures, and indentation fracture toughness. Sintered nanocomposites (with 15 wt% and 25 wt% HA) achieved ∼95% densification with comparable microhardness with respect to bulk TiN. However, the fracture toughness of the nanocomposites was compromised with the addition of the brittle HA phase when compared with pure TiN. The XRD results revealed an interaction between the constituent phases resulting in the formation of calcium titanate (CaTiO 3 ) and α‐ tri calcium phosphate (α‐Ca 3 (PO 4 ) 2 ) due to high processing temperature. Furthermore, microstructures clearly show good bonding between particles. The developed nanocomposites exhibited reasonable properties with biocompatible phases; consequently, the nanocomposites can be candidates for coating other metals and inert biomaterials.
On microstructural and mechanical properties of 21-4-N nitronic steel joint developed using microwave energy Shivani Bhandari, Shivani Gupta, Radha Raman Mishra, Apurbba Kumar Sharma, Navneet Arora Journal of Micromanufacturing, 2023 In the current experimental work, an effort has been made to explore the feasibility of fusion joints of 21-4-N nitronic steel employing microwave heating. These fusion joints were developed inside a domestic microwave applicator operating at 900 W. Microwave energy was used to fabricate the joints in hybrid heating mode by converting electromagnetic energy into heat at 2.45 GHz. Charcoal and SiC plates were used as susceptor and separator, respectively, and nickel powder was used as the interface material. The developed joints were characterized for their microstructural and mechanical properties. The microstructures indicate a complete fusion of nickel interfacing powder with the faying surfaces. XRD results show the formation of metallic nitrides and carbide phases (Cr2N, Fe3N, and Fe2C) and the FeNi phase at the weld zone. Furthermore, the observed average tensile strength of the fusion joints was approximately 61% of base metal. The reduction in the stress and elongation compared to the base metal were 38.67% and 12.68%, respectively. The average microhardness of the microwave joints was monitored as 407 ± 69.27 HV. The results indicate the feasibility of fusion joints of nitronic steel using microwave energy.
Characterization of AZ31/HA Biodegradable Metal Matrix Composites Manufactured by Rapid Microwave Sintering Shivani Gupta, Apurbba Kumar Sharma, Dinesh Agrawal, Michael T. Lanagan, Elzbieta Sikora, Inderdeep Singh Materials, 2023 This study reports the development of magnesium alloy/hydroxyapatite-based biodegradable metal matrix composites (BMMCs) through rapid microwave sintering. Magnesium alloy (AZ31) and hydroxyapatite powder were used in four compositions 0, 10, 15 and 20% by weight. Developed BMMCs were characterized to evaluate physical, microstructural, mechanical and biodegradation characteristics. XRD results show Mg and HA as major phases and MgO as a minor phase. SEM results correlate with the XRD findings by identifying the presence of Mg, HA and MgO. The addition of HA powder particles reduced density and increased the microhardness of BMMCs. The compressive strength and Young’s modulus increased with increasing HA up to 15 wt.%. AZ31-15HA exhibited the highest corrosion resistance and lowest relative weight loss in the immersion test for 24 h and weight gain after 72 and 168 h due to the deposition of Mg(OH)2 and Ca(OH)2 layers at the sample surface. XRD analysis of the AZ31-15HA sintered sample after an immersion test was carried out and these results revealed the presence of new phases Mg(OH)2 and Ca(OH)2 that could be the reason for enhancing the corrosion resistance. SEM elemental mapping result also confirmed the formation of Mg(OH)2 and Ca(OH)2 at the sample surface, which acted as protective layers and prevented the sample from further corrosion. It showed that the elements were uniformly distributed over the sample surface. In addition, these microwave-sintered BMMCs showed similar properties to the human cortical bone and help bone growth by depositing apatite layers at the surface of the sample. Furthermore, this apatite layer can enhance osteoblast formation due to the porous structure type, which was observed in the BMMCs. Therefore, it is indicative that developed BMMCs can be an artificial biodegradable composite for orthopedic applications.
Processing biomaterials using microwave energy and its futuristic scopes Shivani Gupta, Apurbba Kumar Sharma, Dinesh Agrawal Advances in Microwave Processing for Engineering Materials, 2022 Recently, there has been an upsurge in demand for energy-saving material processing techniques in the manufacturing domain of many products. In this regard, materials processing techniques integrated with microwave energy play a substantial role in reducing energy consumption, processing time, and improving the quality of processed materials. Microwave-assisted materials processing techniques, such as making steels, joining of similar and dissimilar metals, coating hard materials for enhancing the wear resistance of the engineering materials, sintering of refractory metals and ceramics, melting/casting of metals, drilling of metals, have been developed successfully. Moreover, microwave-assisted synthesis is widely used to synthesize new materials in chemical, metallurgical and biomedical fields. Microwave-assisted synthesis has been adopted as one of the best fabrication methods of biomaterials due to its unique characteristics. Likewise, microwave-assisted sintering is also widely used in processing various refractory ceramics, such as hydroxyapatite, zirconia, alumina, dental ceramics, metal alloys (Ti-6Al-4V, Ni-Cr, magnesium alloys), polymers, and composites. Many microwave-processed biomaterials have exhibited improved mechanical, metallurgical, and biological properties due to a unique heating mechanism of microwaves-matter interaction, which enhances the heating rate and provides fine and defect-free microstructures. In this chapter, applications of microwave-assisted material processes, especially in processing selected important biomaterials, and how different materials are affected differently in microwaves are discussed. This chapter also deals with the futuristic scope of microwave-based techniques for the processing of biomaterials. Basic knowledge of microwaves processing of biomaterials to readers from different backgrounds are also provided.
Microwave Sintering of Biomaterials: Advances in Processing for Biomedical Applications S Gupta, AK Sharma, V Sampath, D Agrawal Microwave Energy and Biomaterials: Technologies, Processing and Applications … , 2026 2026
Characterization of TiN− HA nanocomposite developed through rapid microwave sintering route at high temperature CS Kumar, S Gupta, AK Sharma International Journal of Applied Ceramic Technology 22 (3), e15070 , 2025 2025 Citations: 3
Scientific Research Methodology: Principles, Tools, and Techniques SS Yadav, S Gupta, AK Choudhary CRC Press , 2025 2025 Citations: 2
Finite Element Analysis of Stress Distribution in Artificial Bone Plate and Fractured Femur Bone P Deshmukh, S Gupta International Conference on Processing and Fabrication of Advanced Materials … , 2024 2024
Characterization of AZ31/HA biodegradable metal matrix composites manufactured by rapid microwave sintering S Gupta, AK Sharma, D Agrawal, MT Lanagan, E Sikora, I Singh Materials 16 (5), 1905 , 2023 2023 Citations: 15
COMSOL Multiphysics: A Simulation Tool to Analyze the Processing of Biodegradable Biomaterials Used in Arthroplasty S Gupta, AK Sharma Innovative Development in Micromanufacturing Processes, 401-411 , 2023 2023 Citations: 4
Microwave Heating Mechanism of AZ31/HA Metal Matrix Biocomposites S Gupta, AK Sharma, D Agrawal, I Singh International Conference on Advances in Materials Processing: Challenges and … , 2022 2022 Citations: 1
Processing biomaterials using microwave energy and its futuristic scopes S Gupta, AK Sharma, D Agrawal Advances in Microwave Processing for Engineering Materials, 191-211 , 2022 2022 Citations: 3
Microstructure and microhardness of Mg/SiC metal matrix composites developed by microwave sintering S Gupta, AK Sharma Journal of The Institution of Engineers (India): Series C 103 (1), 63-68 , 2022 2022 Citations: 8
Measurement of performance characteristics of WEDM while processing AZ31 Mg-alloy using Levy flight MOGWO for orthopedic application KK Goyal, N Sharma, RD Gupta, S Gupta, D Rani, D Kumar, VS Sharma The International Journal of Advanced Manufacturing Technology 119 (11 … , 2022 2022 Citations: 24
On microstructural and mechanical properties of 21-4-N nitronic steel joint developed using microwave energy S Bhandari, S Gupta, RR Mishra, AK Sharma, N Arora Journal of Micromanufacturing 6 (1), 12-18 , 2021 2021 Citations: 5
Microwave processing of biomaterials for orthopedic implants: Challenges and possibilities AK Sharma, S Gupta JOM 72 (3), 1211-1228 , 2020 2020 Citations: 32
Sintering of biomaterials for arthroplasty: A comparative study of microwave and conventional sintering techniques S Gupta, AK Sharma Applied Mechanics and Materials 895, 83-89 , 2019 2019 Citations: 10
Evaluation of hardness and wear resistance of nitride layer on Ti-6Al-4V titanium alloy by tungsten inert gas (TIG) melting process C Panwariya, S Gupta 2017 International Conference on Advances in Mechanical, Industrial … , 2017 2017 Citations: 3
Optimization of process parameters for fabrication of IR aspheric diffractive based on the response surface methodology S Gupta, N Khatri, V Mishra, V Karar, SS Dhami International Conference on Fibre Optics and Photonics, Th3A. 5 , 2016 2016 Citations: 2
Investigation of surface roughness of single point diamond turned germanium substrate by coherence correlation interferometry and image processing S Gupta, N Khatri, V Karar, SS Dhami IOP conference series: materials science and engineering 149 (1), 012032 , 2016 2016 Citations: 4
MOST CITED SCHOLAR PUBLICATIONS
Microwave processing of biomaterials for orthopedic implants: Challenges and possibilities AK Sharma, S Gupta JOM 72 (3), 1211-1228 , 2020 2020 Citations: 32
Measurement of performance characteristics of WEDM while processing AZ31 Mg-alloy using Levy flight MOGWO for orthopedic application KK Goyal, N Sharma, RD Gupta, S Gupta, D Rani, D Kumar, VS Sharma The International Journal of Advanced Manufacturing Technology 119 (11 … , 2022 2022 Citations: 24
Characterization of AZ31/HA biodegradable metal matrix composites manufactured by rapid microwave sintering S Gupta, AK Sharma, D Agrawal, MT Lanagan, E Sikora, I Singh Materials 16 (5), 1905 , 2023 2023 Citations: 15
Sintering of biomaterials for arthroplasty: A comparative study of microwave and conventional sintering techniques S Gupta, AK Sharma Applied Mechanics and Materials 895, 83-89 , 2019 2019 Citations: 10
Microstructure and microhardness of Mg/SiC metal matrix composites developed by microwave sintering S Gupta, AK Sharma Journal of The Institution of Engineers (India): Series C 103 (1), 63-68 , 2022 2022 Citations: 8
On microstructural and mechanical properties of 21-4-N nitronic steel joint developed using microwave energy S Bhandari, S Gupta, RR Mishra, AK Sharma, N Arora Journal of Micromanufacturing 6 (1), 12-18 , 2021 2021 Citations: 5
COMSOL Multiphysics: A Simulation Tool to Analyze the Processing of Biodegradable Biomaterials Used in Arthroplasty S Gupta, AK Sharma Innovative Development in Micromanufacturing Processes, 401-411 , 2023 2023 Citations: 4
Investigation of surface roughness of single point diamond turned germanium substrate by coherence correlation interferometry and image processing S Gupta, N Khatri, V Karar, SS Dhami IOP conference series: materials science and engineering 149 (1), 012032 , 2016 2016 Citations: 4
Characterization of TiN− HA nanocomposite developed through rapid microwave sintering route at high temperature CS Kumar, S Gupta, AK Sharma International Journal of Applied Ceramic Technology 22 (3), e15070 , 2025 2025 Citations: 3
Processing biomaterials using microwave energy and its futuristic scopes S Gupta, AK Sharma, D Agrawal Advances in Microwave Processing for Engineering Materials, 191-211 , 2022 2022 Citations: 3
Evaluation of hardness and wear resistance of nitride layer on Ti-6Al-4V titanium alloy by tungsten inert gas (TIG) melting process C Panwariya, S Gupta 2017 International Conference on Advances in Mechanical, Industrial … , 2017 2017 Citations: 3
Scientific Research Methodology: Principles, Tools, and Techniques SS Yadav, S Gupta, AK Choudhary CRC Press , 2025 2025 Citations: 2
Optimization of process parameters for fabrication of IR aspheric diffractive based on the response surface methodology S Gupta, N Khatri, V Mishra, V Karar, SS Dhami International Conference on Fibre Optics and Photonics, Th3A. 5 , 2016 2016 Citations: 2
Microwave Heating Mechanism of AZ31/HA Metal Matrix Biocomposites S Gupta, AK Sharma, D Agrawal, I Singh International Conference on Advances in Materials Processing: Challenges and … , 2022 2022 Citations: 1
Microwave Sintering of Biomaterials: Advances in Processing for Biomedical Applications S Gupta, AK Sharma, V Sampath, D Agrawal Microwave Energy and Biomaterials: Technologies, Processing and Applications … , 2026 2026
Finite Element Analysis of Stress Distribution in Artificial Bone Plate and Fractured Femur Bone P Deshmukh, S Gupta International Conference on Processing and Fabrication of Advanced Materials … , 2024 2024