Sintered material from alkaline basaltic tuffs

Karamanov, Alexander; Arrizza, Lorenzo; Ergul, Sibel

doi:10.1016/j.jeurceramsoc.2008.07.002

Cited by 21 publications

(15 citation statements)

References 28 publications

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“…This additional porosity was elucidated in different sintered glass-ceramics, forming pyroxenes, 27 as well as in a sintered material by milled basalitic tuffs. 28 It was supposed that similar phenomena take place also in some of the studied compositions.…”

Section: Phase Formationmentioning

confidence: 76%

Ceramics from blast furnace slag, kaolin and quartz

Karamanova

Avdeev

Karamanov

2011

Journal of the European Ceramic Society

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Section: Phase Formationmentioning

confidence: 76%

Ceramics from blast furnace slag, kaolin and quartz

Karamanova

Avdeev

Karamanov

2011

Journal of the European Ceramic Society

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“…Basalts are fine grained compact rocks and tuffs, which are the major constituent of ocean islands and common component of the continental masses as well [13][14][15][16]. Basalt base materials have superior abrasion, wear and chemical resistant materials.…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of Basalt Filled Low Density Polyethylene Composites

2011

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The friction and wear performance of pure LDPE and 10%, 30%, 50% and 70% basalt filled (by wt) LDPE composite were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under 5, 10 and 20N loads and at 0.5, 1.0 and 1.5 m/s sliding speeds. The coefficients of friction of the composites were significantly influenced with increase in basalt content. Friction coefficient of the LDPE was getting decreased from 0.51 to 0.13 with increase in basalt content, depending on applied loads and sliding speeds. The results show that the wear rates for pure LDPE and basalt filled composites increase with increasing loads and sliding speeds. The wear rates of the basalt filled composites were significantly affected from the basalt content. Wear rates of the LDPE was decreased from 2.596×10 −3 to 6.8×10 −5 mm 3 /m with increase in basalt content, depending on applied loads and sliding speeds.

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“…In these studies sintered glass-ceramics belonging to the pseudo-binary system albite-diopside, which form different percentages of diopside, were used. Later P CR formation was confirmed in other sintered glass-ceramic systems [53][54][55][56][57][58][59][60][61][62], as well as in some new ceramics with high crystallinity [63][64][65]. During sinter-crystallization, processes of densification and crystal phase formation take place in the same temperature interval.…”

Section: Introductionmentioning

confidence: 88%

8. Stress-induced Pore Formation and Phase Selection in a Crystallizing Stretched Glass

Fokin¹,

Karamanov²,

Abyzov³

et al. 2014

Glass

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In the present chapter, we describe results of experimental investigations and theoretical analysis of phase selection and nucleation of pores in small samples of undercooled diopside liquid when it is enclosed by a solid crystalline surface layer. The formation of the surface crystalline layer starts with nucleation and growth of highly dense diopside crystals. At the moment of impingement of these crystals on the sample surface, the crystallization pathway switches from diopside to a wollastonite-like (WL) phase. The origin of such switch can be explained by the fact that the formation of the WL-crystal produces less elastic stress energy than the same amount of diopside. This difference is due to the lower (as compared to diopside) density of the WL-crystal phase, which is closer to the liquid density. The relative content of the two crystalline phases can be changed by varying the sample size. Due to the density misfit the growth of the WL-crystalline layer leads to uniform stretching of the encapsulated liquid. This negative pressure leads finally to the formation of one small pore, which rapidly grows up to a size that almost eliminates the elastic stress and, therefore, dramatically reduces the driving force for further pore nucleation. The nucleation process of the pore is experimentally found to occur in a very narrow range of the relative widths of the surface layer (compared to the sample size) and, consequently, of negative pressures. We consider this fact as an indication that pore nucleation proceeds via homogeneous nucleation. The above-given qualitative explanation of the observed phenomena is corroborated by detailed theoretical calculations of elastic stress fields and their impact on phase selection and pore nucleation. Good qualitative and partly even quantitative agreement between experiment and theory is found. An overview on other systems with similar or related properties is included as well. The findings of this research are quite general because the densities of most glasses significantly differ from those of their iso-chemical crystals. By this reason, the studied phenomena are of high technological significance for the development of different types of glass-ceramic materials and the understanding and control of sinter-crystallization processes. The latter problem is also considered in the present chapter.

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Sintered material from alkaline basaltic tuffs

Cited by 21 publications

References 28 publications

Ceramics from blast furnace slag, kaolin and quartz

Ceramics from blast furnace slag, kaolin and quartz

Wear Behavior of Basalt Filled Low Density Polyethylene Composites

8. Stress-induced Pore Formation and Phase Selection in a Crystallizing Stretched Glass

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