Conclusions
The thermal-shock resistance of forsterite and chrome-forsterite refractories is due to the macro- and microstructure, including the distribution of the large and fine pores.
In forsterite refractories microcracks are developed into cracks of relatively large extent, which causes a reduction in the thermal-shock resistance of these refractories. In chrome-forsterite refractories the development of the microcracks is localized in small sections of the material which retard the process of breakdown.
The magnitude of the residual strength\((\sigma _{n^{bend} } /\sigma _0 bend)\) can satisfactorily characterize the thermal-shock resistance of forsterite refractories.
The forsterite refractories are thermally resistant during cyclic heating to 800°C, and the chrome3-forsterite up to 1300°C.
After the action of multilateral cyclic heatings, the products posses lower residual strength than than after single-sided heatings.
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Translated from Ogneupory, No. 9, pp. 50–57, September, 1969.
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Bron, V.A., Uzberg, A.I. & Karzhavina, T.P. Effect of cyclic heating on the structure and strength of forsterite refractories. Refractories 10, 576–581 (1969). https://doi.org/10.1007/BF01295339
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DOI: https://doi.org/10.1007/BF01295339