A spinel forming castable with an initial MgO content of 8%, commonly applied in refractory linings in the steel industry, was characterised with regard to the creep behaviour. Three creep stages were observed for 1300, 1400, and 1500 °C for application relevant loads between 3 and 8 MPa for sintered samples.
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Download scientific diagram | Compression creep experimental setup. from publication: Experimental Investigation of the Tension and Compression Creep Behavior of Alumina-Spinel Refractories at ...
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Spinel is a mineral that belongs to the spinel group, which includes a variety of minerals that share a similar crystal structure. The chemical formula of spinel is MgAl2O4, where Mg represents magnesium and Al represents aluminum.
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The most extensive studies of creep of spinel are those of Palmour and his co-workers. The maps show data from the compression tests of Choi (1965) [25] (see Choi and Palmour, 1965 [26]) and from the bend tests of Palmour (1966) [27]. This second set of tests gave data which lie at stresses which are too low, either because a steady state was ...
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The modulus of rupture and creep behaviour of refractory castables at high temperature (1000–1400 °C) with additions of spinel, periclase and dolomite has been studied.Three processing routes for obtaining refractory concretes within the alumina-rich zone of the Al 2 O 3 –MgO–CaO ternary system were employed. To achieve high temperature …
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Fracture toughness, four-point bending strength of transparent spinel, Y 2 O 3 and YAG ceramics in function of temperature (from room temperature up to 1500° C) were measured. Creep resistance at 1500–1550° C was studied too.Grain size distribution was determined on polished and etched surfaces of samples.
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Due to their high corrosion resistance to basic slags, either pre-formed or in situ spinel (MgAl 2 O 4) containing refractory castables are nowadays widely used as steel ladle linings.Nevertheless, whereas the pre-formed spinel castables present high volumetric stability and a well-known processing technology, the in situ spinel castables still require further …
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Compression creep experiments on a fine-grained (250 nm) polycrystalline magnesium aluminate spinel were successfully performed in the 1100-1200°C temperature range, under an applied stress of ...
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Download scientific diagram | XRD result after sintering at 1600 • C. from publication: Investigation of three-stage compressive creep of a spinel forming refractory castable containing 8% MgO ...
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Compression creep experiments on a fine-grained (250 nm) polycrystalline magnesium aluminate spinel were successfully performed in the 1100–1200 °C temperature range, under an applied stress of 120–200 MPa. It was found that the stress exponent and activation energy depended on temperature and applied stress, respectively.
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Semantic Scholar extracted view of "Creep of MgO-rich spinel single crystals" by G. Corman. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 224,361,937 papers from all fields of science. Search. Sign In Create Free Account.
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Identification of the asymmetric creep properties for the alumina-spinel material at 1300 °C. Fig. 19 shows the relative vertical displacement of the upper point of the Brazilian test samples at 1300 °C, calculated using DIC, that corresponds to the difference between the vertical displacements at the upper part and the vertical displacements ...
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Creep experiments performed on a 5 wt.% zirconia- MgAl 2 O 4 spinel material, in the stress and temperature ranges 8–200 MPa and 1350–1410°C, have shown the importance of grain boundaries in deformation of this material. Deformation can be analysed as the result of two sequential contributions. At low stress, an increase in the apparent stress exponent and the …
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A spark plasma sintering (SPS) apparatus was used for the first time as an analytical testing tool for studying creep in ceramics at elevated temperatures. Compression creep experiments on a fine-grained (250 nm) polycrystalline magnesium aluminate spinel were successfully performed in the 1100-1200 …
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Fig. 6 shows the creep strength of the slab vs. depth along the coldest portion for three different spinel creep laws and two different subduction velocities. As can be seen, the creep strength in the central portions of fast slabs drops down by several orders of magnitude and assumes a minimum near to the depth where the phase transformation ...
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The current study investigated the scatter in compressive creep behavior of a shaped alumina spinel containing refractory material. A sampling scheme was considered to examine the effect of specimen's spatial position in a brick on the creep behavior. It showed that the drilling position and direction of specimens in a brick had an evident ...
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