Cavitation Wear of Basalt-Based Glass Ceramic

Abstract

This paper examines the possibility of using basalt-based glass ceramics for construction of structural parts of equipment in metallurgy and mining. An ultrasonic vibration method with a stationary sample pursuant to the ASTM G32 standard was used to evaluate the possibility of the glass ceramic samples application in such operating conditions. As the starting material for synthesis of samples, olivine–pyroxene basalt from the locality Vrelo–Kopaonik Mountain (Serbia) was used. In order to obtain pre-determined structure and properties of basalt-based glass ceramics, raw material preparation methods through the sample crushing, grinding, and mechanical activation processes have been examined together with sample synthesis by means of melting, casting, and thermal treatment applied for the samples concerned. The mass loss of samples in function of the cavitation time was monitored. Sample surface degradation level was quantified using the image analysis. During the test, changes in sample morphology were monitored by means of the scanning electronic microscopy method. The results showed that basalt-based glass ceramics are highly resistant to cavitation wear and can be used in similar exploitation conditions as a substitute for other metal materials.

Comparison of the formation and development of cavitation damage on cast and sintered samples based on basalt

“…The samples of cast basalt (label: CB) were obtained by melting the basalt aggregate at the temperature 1250 °C and casting into sand molds. For the purpose of reducing stress, the casting are thermally treated at 890°C/2h [29].The sintered basalt samples (label: SB) were obtained by pressing the basalt powder of 20 μm grain size at the Leitz press under pressure of 1 MPa and sintering at 1150 °C/2h [30]. The dimensions of samples CB and SB were: (15×15×15) mm.…”

“…During the cavitation erosion test, the mass loss of samples was measured. The formation and development of damage to the surface of the samples was followed by the image analysis using Image Pro Plus software program [27][28][29][30].…”

Coating based on basalt protection metal structures

“…Za ispitivanje kavitacione otpornosti zaštitnih premaza korišćena je ultrazvučna vibraciona metoda (sa stacionarnim uzorkom) prema standardu ASTM G-32 [20,21] i proceduri opisanoj u objavljenim radovima [6,22,23]. Tokom ispitivanja koncentrator mehaničkih vibracija je svojim donjim krajem uronjen u vodeno kupatilo temperature 25±1⁰C.…”

Effect of iron on the microstructure of basalt glass‐ceramics obtained by the petrurgic method

“…The basalt from SGF has a high iron content (Fe 2 O 3 + FeO), about 13 wt% (percentage by weight), when compared to basalts from other formations, for example, basalt from Thrace region (Turkey) 25 has 10.74 wt%, from Vrelo‐Kopaonik (Serbia) 26 has 4.12 wt%, and from Egypt 27 has 12.63 wt%. Thus, evaluating the influence of iron on the crystallization of SGF basalt is essential for it to become a glass‐ceramic product with excellent properties and several applications.…”