Synergistic effect of cementite amorphization and oxidation on forming a nanocomposite self-lubricating surface during sliding

Yin, Cunhong; Yang, Chen; Wu, Yuzhong; Liang, Yilong; Zhu, Zhenlong

doi:10.1016/j.compositesb.2022.109799

Cited by 21 publications

(2 citation statements)

References 49 publications

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“…Additionally, the amorphous area of DAL (Area = 26 924) showed noticeable shrinkage compared to LS (Area = 28 709) in Figure . The mechanical mixing of DOPO and LS promotes the activation and formation of DAL . While X-ray data alone could not directly determine the accurate cross-linking of DOPO and LS or detect changes in functional groups, the formation of new diffraction peaks indicates the formation of DAL.…”

Section: Resultsmentioning

confidence: 99%

“…The mechanical mixing of DOPO and LS promotes the activation and formation of DAL. 37 While X-ray data alone could not directly determine the accurate cross-linking of DOPO and LS or detect changes in functional groups, the formation of new diffraction peaks indicates the formation of DAL. Further analysis of the crosslinking and structural changes of DAL are conducted using SEM, FTIR, XPS, and solid-state 13 C NMR.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Synthesis and Characterization of Sodium Lignosulfonate-Based Phosphorus-Containing Intermediates and Its Composite Si–P–C Silicone-Acrylic Emulsion Coating for Flame-Retardant Plywood

Lai,

Wang,

et al. 2024

Langmuir

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Through the substitution reaction between 9,10dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and sodium lignosulfonate (LS), a novel phosphorus-containing sodium lignosulfonate (DAL) was successfully synthesized via the solvothermal method and used as a multifunctional flame retardant to prepare a novel silicone-acrylic emulsion (SAE) composite Si− P−C coating. The structure of DAL was determined by X-ray diffraction (XRD), attenuated total reflection infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and nuclear magnetic resonance (solid-state 13 C NMR and 31 P NMR). The results demonstrated that incorporating an appropriate dosage of DAL (0.9 g, 1.5 wt %) into SAE-based composite coatings enhances flame retardancy and reduces heat release and smoke production during burning. The peak heat release rate (p-HRR) decreases from 236.7 to 120.3 kW•m −2 , total smoke production (TSP) decreases by 71.1%, and the flame-retardant index increases from 1.00 to 4.58. Meanwhile, the coating is transformed into a dense and nonflammable vitreous polyphosphate barrier layer during the firing process to prevent heat or mass transfer. Furthermore, the pyrolysis kinetics identify that the 3D Z−L−T model governs the coatings' pyrolysis, and the appropriate DAL makes the pyrolysis E α climb from 300.98 to 331.30 kJ•mol −1 at 358−439 °C. Hence, this study presents a new synthesis method of multifunctional flame retardant DAL, studies the excellent properties and cross-linking mechanism of DAL-doped SAEcomposite Si−P−C coatings, and explores a halogen-free, low-carbon, and clean eco-technology strategy.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis and Characterization of Sodium Lignosulfonate-Based Phosphorus-Containing Intermediates and Its Composite Si–P–C Silicone-Acrylic Emulsion Coating for Flame-Retardant Plywood

Lai,

Wang,

et al. 2024

Langmuir

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Superior Self‐Lubricating Coatings with Heterogeneous Nanocomposite Structures on Ti–Nb–Zr–Ta–Hf Refractory Multi‐Principal Element Alloy

Zhang,

Chen,

Cao

et al. 2024

Adv Funct Materials

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There is tremendous interest in the development of highly wear‐resistant coatings for metallic materials to reduce energy loss and prolong service life. In this study, the authors propose an approach to develop nanocomposite coatings featuring deformable nanocrystals embedded in amorphous matrix for self‐lubrication and superior wear resistance. The dual‐layered nanocomposite coatings are prepared by plasma electrolytic oxidation (PEO) on a Ti‐Nb‐Ta‐Zr‐Hf (TNZTH) refractory multi‐principal element alloy (RMPEA) and commercially pure Ti (cpTi). The inner layers of PEO coatings are composed of substrate element oxides (amorphous TNZTH─O oxide or anatase TiO2), while their outer layers exhibit typical nanocomposite structures. Different from the cpTi‐based PEO coating outer layers composed of brittle rutile TiO2 nanoparticles dispersed in an amorphous matrix of SiO2 and Na2O·nSiO2, the outer layers of TNZTH‐based PEO coatings are featured by deformable Na2Zr(Hf)O3 nanocrystals heterogeneously embedded in an inhomogeneous amorphous matrix composed of TNZTH─O oxide, SiO2, and Na2O·nSiO2. As a result, the TNZTH‐based PEO coatings exhibit favorable self‐lubricating performance and superior wear resistance, while the cpTi‐based PEO coatings are completely destroyed after sliding wear. Thus, this study offers valuable insights into the design and development of self‐lubricating coatings with superior wear resistance for metallic materials.

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Significantly lowering friction and wear of CoCrNi medium-entropy alloy film via massive interstitial carbon-induced amorphization

Zhuang,

Liang,

Yang

et al. 2024

Acta Materialia

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Synergistic effect of cementite amorphization and oxidation on forming a nanocomposite self-lubricating surface during sliding

Cited by 21 publications

References 49 publications

Synthesis and Characterization of Sodium Lignosulfonate-Based Phosphorus-Containing Intermediates and Its Composite Si–P–C Silicone-Acrylic Emulsion Coating for Flame-Retardant Plywood

Synthesis and Characterization of Sodium Lignosulfonate-Based Phosphorus-Containing Intermediates and Its Composite Si–P–C Silicone-Acrylic Emulsion Coating for Flame-Retardant Plywood

Superior Self‐Lubricating Coatings with Heterogeneous Nanocomposite Structures on Ti–Nb–Zr–Ta–Hf Refractory Multi‐Principal Element Alloy

Significantly lowering friction and wear of CoCrNi medium-entropy alloy film via massive interstitial carbon-induced amorphization

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