Crystallization mechanism of basalt glass fibers in air

Manylov, Mikhail S.; Gutnikov, Sergey I.; Похолок, К. В.; Lazoryak, Bogdan I.; Lipatov, Yakov V.

doi:10.1016/j.mencom.2013.11.021

Cited by 34 publications

(15 citation statements)

References 17 publications

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“…Obtained basaltic glass fibers are annealed at 1073, 1173, 1273, 1373, and 1473 K for 24 h in air atmosphere to identify the crystalline phases and their formation sequence. As it is shown by Manylov et al ., the BCF crystallization starts with the formation of a spinel phase magnesioferrite MgFe 2 O 4 [ICDD№73‐2211] at 1048 K. Then, the spinel phase particles act as nucleation sites for the crystallization of augite Ca(Fe,Mg)Si 2 O 6 [ICDD№24‐201] at 1175 K. At about 1365 K, anorthite CaAl 2 Si 2 O 8 [ICDD№2‐523] and hematite Fe 2 O 3 [ICDD№89‐598] become dominant crystalline phases. The crystallization mechanism of sample with 6 mol% Na 2 O is similar (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Basalt fibers have better tensile strength than the E‐glass fibers, greater failure strain than the carbon fibers as well as good resistance to chemical attack . Furthermore, in contrast to glass fiber‐reinforced plastic, in which E‐glass fibers are sintered under combustion, basalt fibers possess a high ability to crystallize and disintegrate into small particles that greatly simplifies BFRP recycling …”

Section: Introductionmentioning

confidence: 99%

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Effects of Ion Exchange on the Mechanical Properties of Basaltic Glass Fibers

Kuzmin

Zhukovskaya

Gutnikov

et al. 2015

Int J of Appl Glass Sci

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Basaltic glass fibers with different lithium oxide (6-14 mol%) and sodium oxide (2-14 mol%) contents were prepared. The influence of Li 2 O and Na 2 O content on the process of fiber manufacturing was investigated. Addition of alkali oxides reduced the forming temperature and substantially expanded the fiber-forming temperature ranges. The obtained thermal data from differential thermal analysis revealed a decline in glass transition temperature (T g ) of fibers against the compositional changes. The inclusion of Li 2 O and Na 2 O in the glass network led to a reduction in its thermal stability. The obtained X-ray diffraction patterns and IR spectra of Li-rich and Na-rich basaltic glass fibers confirmed the formation of highly polymerized structures such as LiAl(Si 2 O 6 ) and (Na,K)(AlSiO 4 ), respectively, and relatively depolymerized silicate anions. The effects of potassium-lithium and potassium-sodium ion exchange on the mechanical properties of basaltic glass fibers were investigated. As-received Li-rich and Na-rich basaltic glass fibers were ion-exchanged in potassium nitrate for different exchange times, and their mechanical properties were measured before and after chemical tempering. The measured tensile strength and Young's modulus values of the fibers showed an increase after treatment in molten salt. * Fig. 5. Young's modulus of as-received basalt fibers, Li-rich and Na-rich basaltic glass fibers before and after ion exchange in KNO 3 salt melt at 673 K for different exchange times (t = 15, 30 and 90 min). www.ceramics.org/IJAGSIon Exchange of Basaltic Glass Fibers 125

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Ion Exchange on the Mechanical Properties of Basaltic Glass Fibers

Kuzmin

Zhukovskaya

Gutnikov

et al. 2015

Int J of Appl Glass Sci

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“…This is because the Hagen-Poiseuille equation ignores the nonisothermal nature of the melt in nozzles. This effect should be greatly enhanced for continuous basalt fibers, which have a high crystallization capacity [11,20].…”

Section: Discussionmentioning

confidence: 99%

“…The effect of the nozzle diameter and the conditions of obtaining fiber on its strength were studied in this work. Fiber strength is affected by a very large number of factors, including structure anisotropy [15], high crystallization ability [20], chemical composition fluctuations [21], ambient temperature and quenching speed [23], axial stress [14], etc. Thus, it is very difficult to isolate the influence of one factor in any study of this issue.…”

Section: Discussionmentioning

confidence: 99%

“…Due to low thermal conductivity and viscosity, the basalt melt flowing through the nozzle plate has a high temperature gradient [16,19]. Due to its high crystallization ability, this can have a significant effect on the stability of the fiber-forming process as well as the mechanical properties of the fibers [20]. The diameter of the nozzle can have a significant impact on this process.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nozzle Diameter on Basalt Continuous Fiber Properties

Gutnikov

Lazoryak

2019

Fibers

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The experimental data presented in this work show the effects of nozzle diameter, drawing speed, and formation temperature on the diameter and strength of basalt filaments and melt flow rate. Several series of basalt continuous fibers were obtained using a specially designed crucible of platinum–rhodium alloy with four nozzles of different diameters (1.5, 2.5, 3.5, and 4.5 mm). The conditions of the process varied in formation temperature (from 1370 to 1450 °C) and winding speed (from 300 to 1200 m/min). Melt flow rate was almost independent of the winding speed, indicating laminar flow of the melt through the nozzles and the Newtonian nature of the liquid. The results show strict correlations between fiber diameter, nozzle diameter, and winding speed. The diameter of the fibers had a significant effect on their strength. The tensile strength of the obtained basalt fibers varied from 550 to 3320 MPa depending on the formation conditions. The results of this work could be useful not only for scientists, but also for technologists seeking the optimal conditions for technological processes.

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Influence of the Chemical Composition of Minerals on the Mechanical Properties of Basalt Continuous Fibers

Попов

Gutnikov

2023

Springer Proceedings in Earth and Environmental Sciences

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Crystallization mechanism of basalt glass fibers in air

Cited by 34 publications

References 17 publications

Effects of Ion Exchange on the Mechanical Properties of Basaltic Glass Fibers

Effects of Ion Exchange on the Mechanical Properties of Basaltic Glass Fibers

Effect of Nozzle Diameter on Basalt Continuous Fiber Properties

Influence of the Chemical Composition of Minerals on the Mechanical Properties of Basalt Continuous Fibers

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