Preparation, microstructure and mechanical property of double-layered metal-ceramic hollow spheres

Cao, Mengxin; Jiang, Fengchun; Wang, Chunhe; Cui, Hongyang; Guo, Chunhuan; Chang, Yunpeng; Wang, Zhenqiang

doi:10.1016/j.msea.2020.139188

Cited by 19 publications

(6 citation statements)

References 44 publications

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“…The compressive strength of ceramic spheres was obtained using a universal testing machine (AGS-X-10 kN, Shimadzu). The compressive strength of the spheres is defined as the fracture load per their maximum cross-sectional area, and the average strength was obtained by measuring 10 samples for each at each data point, 37 which has been added in the revised manuscript. Fourier transform infrared (FTIR) spectroscopy was performed on a Nicolet iN10 FT-IR microscope (Thermo Nicolet Corp.).…”

Section: Methodsmentioning

confidence: 99%

Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Yan

Guo

et al. 2022

ACS Omega

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Porous double-shelled ceramic hollow spheres (PDSs) have attracted extensive attention due to their high specific surface areas and multifunctional designs. When used in wastewater treatment, millimeter or sub-millimeter spheres can be quickly separated from water by commercial sieves. However, the simple, scalable, and low-cost preparation of sub-millimeter PDSs in the solid phase remains a challenge. Herein, porous PDSs were facilely fabricated via a spheronization process utilizing pseudoboehmite powders and wet gelatin spheres as templates, which broke through the difficulty of preparing PDSs by one-step solid-state synthesis. Treating pseudoboehmite powder with nitric acid can improve the compressive strength of the PDSs. By controlling the rolling time and gelatin concentration of gelatin microspheres, the integrity, shell thickness, and double-shelled spacing of the gelatin microspheres were tuned. When the rolling time was 8–12 min, and the gelatin concentration in gelatin spheres was 250 g/L, and PDSs with a complete double-shelled structure, good mechanical property, and high specific surface area (327.5–509.6 m2/g) were obtained at 600 °C. The adsorption capacities of the PDSs for 100 mg/L Congo red solution (70.7 mg/g) were larger than those of single-shelled hollow spheres (49 mg/g), and larger diameters (608–862 μm) of the PDSs allow them to be rapidly separated from solution by a commercial sieve. This paper provides a facile and scalable method for the preparation of sub-millimeter PDSs and demonstrates their excellent adsorption capacity for Congo red solution.

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Section: Methodsmentioning

confidence: 99%

Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Yan

Guo

et al. 2022

ACS Omega

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“…The 316 L stainless steel hollow spheres (316 L HS) with diameter of 2.5 mm were prepared by our team through powder metallurgy. 36,37 The adhesive was ethyl α-cyanoacrylate purchased from Shanghai Kangda new chemical materials Co., Ltd.…”

Section: Methodsmentioning

confidence: 99%

“…The polyurethane resin (PU, including the polyol and isocyanate) was purchased from Easy Composites (Beijing) Technology Co., Ltd. The 316 L stainless steel hollow spheres (316 L HS) with diameter of 2.5 mm were prepared by our team through powder metallurgy 36,37 . The adhesive was ethyl α‐cyanoacrylate purchased from Shanghai Kangda new chemical materials Co., Ltd.…”

Section: Methodsmentioning

confidence: 99%

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Jiang

Cao

et al. 2021

Polymers for Advanced Techs

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As a noval functional material designed and prepared artificially, one-dimensional phononic crystal has a great prospect in the field of noise reduction. In this study, a novel one-dimensional phononic crystal metamaterial based on the metallic hollow spheres (MHS)/polymer matrix laminated composites was designed and prepared.The result of impedance tube test shows that the laminated composite has excellent sound insulation performance. The incident direction of sound waves has little effect on the sound insulation performance of the laminated composites. The average sound insulation of MHSP/SR-LC (MHSP side) was 44.4% higher than that of SR and 272.0% higher than that of PU. After analysis, it can be found that the average sound insulation of laminated composites increases with the acoustic impedance increasing, but the equivalent mass density and equivalent bulk modulus have little effect on it. The metallic hollow spheres can increase the sound energy loss by extending the transmission path of sound waves, andit can also improve the sound insulation by changing the density, elastic, and hardness of SR and PU matrix to increase the resonance strength of the spring-mass oscillator. This work may open up new possibilities for the development of novel acoustic materials applied in noise control.

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“…After the analysis of pure 316L, the condition of 1100 • C/4 h was discarded from the compressive strength test and β-TCP analysis, due to the worse microstructural and microhardness results that it presented. The only way to improve the atomic diffusion of 316L stainless steel would be by increasing the energy of the sintering process since both temperatures of 1000 and 1100 • C are below 1200 • C, which is indicated in literature [45] as the ideal temperature for 316L stainless steel sintering. At this temperature, the atoms of 316L achieve the third diffusional stage with only 1 h of heat treatment.…”

Section: Evaluation Of Best Sintering Temperaturementioning

confidence: 99%

Production and Characterization of a 316L Stainless Steel/β-TCP Biocomposite Using the Functionally Graded Materials (FGMs) Technique for Dental and Orthopedic Applications

Kuffner

Capellato

Ribeiro

et al. 2021

Metals

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Metallic biomaterials are widely used for implants and dental and orthopedic applications due to their good mechanical properties. Among all these materials, 316L stainless steel has gained special attention, because of its good characteristics as an implantable biomaterial. However, the Young’s modulus of this metal is much higher than that of human bone (~193 GPa compared to 5–30 GPa). Thus, a stress shielding effect can occur, leading the implant to fail. In addition, due to this difference, the bond between implant and surrounding tissue is weak. Already, calcium phosphate ceramics, such as beta-tricalcium phosphate, have shown excellent osteoconductive and osteoinductive properties. However, they present low mechanical strength. For this reason, this study aimed to combine 316L stainless steel with the beta-tricalcium phosphate ceramic (β-TCP), with the objective of improving the steel’s biological performance and the ceramic’s mechanical strength. The 316L stainless steel/β-TCP biocomposites were produced using powder metallurgy and functionally graded materials (FGMs) techniques. Initially, β-TCP was obtained by solid-state reaction using powders of calcium carbonate and calcium phosphate. The forerunner materials were analyzed microstructurally. Pure 316L stainless steel and β-TCP were individually submitted to temperature tests (1000 and 1100 °C) to determine the best condition. Blended compositions used to obtain the FGMs were defined as 20% to 20%. They were homogenized in a high-energy ball mill, uniaxially pressed, sintered and analyzed microstructurally and mechanically. The results indicated that 1100 °C/2 h was the best sintering condition, for both 316L stainless steel and β-TCP. For all individual compositions and the FGM composite, the parameters used for pressing and sintering were appropriate to produce samples with good microstructural and mechanical properties. Wettability and hemocompatibility were also achieved efficiently, with no presence of contaminants. All results indicated that the production of 316L stainless steel/β-TCP FGMs through PM is viable for dental and orthopedic purposes.

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Preparation, microstructure and mechanical property of double-layered metal-ceramic hollow spheres

Cited by 19 publications

References 44 publications

Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Production and Characterization of a 316L Stainless Steel/β-TCP Biocomposite Using the Functionally Graded Materials (FGMs) Technique for Dental and Orthopedic Applications

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Preparation, microstructure and mechanical property of double-layered metal-ceramic hollow spheres

Cited by 19 publications

References 44 publications

Scalable Preparation of Sub-Millimeter Double-Shelled Al2O3 Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Scalable Preparation of Sub-Millimeter Double-Shelled Al2O3 Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Production and Characterization of a 316L Stainless Steel/β-TCP Biocomposite Using the Functionally Graded Materials (FGMs) Technique for Dental and Orthopedic Applications

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Product

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Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red

Scalable Preparation of Sub-Millimeter Double-Shelled Al₂O₃ Hollow Spheres and Their Rapid Separation from Wastewater after Adsorption of Congo Red