Eng. PhD. Dumitru-Doru Burduhos-Nergis – Galerie figuri (MDPI)

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SEM micrographs of powders – XRD and TG-DTA Study of New Alkali Activated Materials Based on Fly Ash with Sand and Glass Powder (Materials, 2020) — SEM micrographs of powders Din: XRD and TG-DTA Study of New Alkali Activated Materials Based on Fly Ash with Sand and Glass Powder (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#SEM#microstructure#fly-ash#glass

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Process flow for geopolymer preparation – XRD and TG-DTA Study of New Alkali Activated Materials Based on Fly Ash with Sand and Glass Powder (Materials, 2020) — Process flow for geopolymer preparation Din: XRD and TG-DTA Study of New Alkali Activated Materials Based on Fly Ash with Sand and Glass Powder (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#process#geopolymer#synthesis

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Specimens and measurement scheme – Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity (Materials, 2021) — Specimens and measurement scheme Din: Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#UPV#methodology#NDT

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Methodology: UPV ? Elastic moduli ? f'c – Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity (Materials, 2021) — Methodology: UPV ? Elastic moduli ? f'c Din: Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#model#methodology#UPV

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Saltwater immersion ? visual appearance (C45 / PS / PPS) – Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021) — Saltwater immersion ? visual appearance (C45 / PS / PPS) Din: Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#immersion#seawater#paint#phosphate

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EIS Nyquist plot and equivalent circuit – Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021) — EIS Nyquist plot and equivalent circuit Din: Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#EIS#equivalent-circuit#Nyquist

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SEM micrographs after immersion – Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021) — SEM micrographs after immersion Din: Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#SEM#corrosion#surface

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EDS spectrum and elemental maps – Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021) — EDS spectrum and elemental maps Din: Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater (Materials, 2021). DOI. © Autori, MDPI, CC BY 4.0.
#EDS#mapping#composition

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SEM: fly ash vs. bottom ash – XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022) — SEM: fly ash vs. bottom ash Din: XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022). DOI. © Autori, MDPI, CC BY 4.0.
#SEM#fly-ash#bottom-ash

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XRD: raw materials (CA, MK, MT) – XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022) — XRD: raw materials (CA, MK, MT) Din: XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022). DOI. © Autori, MDPI, CC BY 4.0.
#XRD#raw#materials

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XRD: geopolymer samples (MK-geo, CAMK, CA-geo) – XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022) — XRD: geopolymer samples (MK-geo, CAMK, CA-geo) Din: XRD and TG-DTA Study of New Phosphate-Based Geopolymers with Coal Ash or Metakaolin as Aluminosilicate Source and Mine Tailings Addition (Materials, 2022). DOI. © Autori, MDPI, CC BY 4.0.
#XRD#geopolymers

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Phosphating process flow diagram – Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020) — Phosphating process flow diagram Din: Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#process#phosphating#flow

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SEM morphology of phosphate layers – Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020) — SEM morphology of phosphate layers Din: Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#SEM#phosphate#coating

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EIS model: equivalent circuit – Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020) — EIS model: equivalent circuit Din: Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#EIS#model#equivalent-circuit

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R(C(R(QR))) model for porous coating – Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020) — R(C(R(QR))) model for porous coating Din: Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#EIS#porous-coating#model

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Two-CPE model (CPE1/CPE2) ? EIS – Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020) — Two-CPE model (CPE1/CPE2) ? EIS Din: Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing (Applied Sciences, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#EIS#CPE#coating

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General synthesis scheme for geopolymers – Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020) — General synthesis scheme for geopolymers Din: Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#process#geopolymer#scheme

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SEM: pore types and reinforcement particles – Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020) — SEM: pore types and reinforcement particles Din: Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#SEM#porosity#microstructure

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Relative distributions across composition series – Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020) — Relative distributions across composition series Din: Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#NMR#distribution#composition

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FTIR: glass powder vs. fly ash – Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020) — FTIR: glass powder vs. fly ash Din: Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#FTIR#glass#fly-ash

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FTIR: geopolymer samples (various recipes) – Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020) — FTIR: geopolymer samples (various recipes) Din: Revealing the Influence of Microparticles on Geopolymers? Synthesis and Porosity (Materials, 2020). DOI. © Autori, MDPI, CC BY 4.0.
#FTIR#geopolymers

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