FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2604499810> ?p ?o ?g. }

• W2604499810 abstract "authors of [5, 6], who investigated the effects on subsequent sintering. It is shown that the reduction in sintering temperature resulting from HST and the increase in density of magnesia and alumina are caused mainly by the increase in the density of the pressings and the reinforcement of the mass-transfer processes during sintering, due to the dislocations formed in the powder during HST. Meanwhile, the question of the causes of the increased strength in the sintered oxides due to this treatment has not been systematically investigated. It should be noted that the increase in the strength cannot be explained by the reduction in the sintering temperature in itself, since in order to increase the strength of materials not subjected to HST it is sufficient to increase the sintering temperature. However, in fact, this is not observed (see [2, 3], for example). The strength increase cannot be explained simply by the increase in the density of the sintered material, since in [5], using magnesia as an example, it was shown that an increase in the HST pressure is accompanied by an intensification of the recrystallization during sintering, and it is well known that recrystallization causes a fall in the material's strength. The aim of the present work was to investigate further the effect of HST on the strength of sintered magnesia and to study the nature of this influence. The starting powder was magnesia with a purity of 99.97% (specially purity, 11-2, TU 6-09-2807-78) with an average particle size of 0.3-0.5/~m. To remove the moisture adsorbed on the particle surfaces, the powder was calcined in air at 1200~ for 1 h. HST at pressures of 0.3, 1.0, 1.5, and 2.0 GPa was carried out with simultaneous shaping, using paper shells, according to the method described in [5]. Sintering was done in air at 1400-1700~ The sintering time was varied from 1 to 8h. Such a wide range of sintering schedules is used because HST causes a fall in the sintering temperature, and an increase in this fall depends on the HST pressure. Thus, during the study of the effect of HST on the strength of the sintered material it is necessary to find the optimum sintering cycle for each pressure used. The dimensions of the sintered specimens were approximately 5 x 5 x 25 ram. Hydrostatic weighing was used to determine the density of the sintered specimens, and then the strength under 3-point bending was measured. The distance between the supports in the bending tests was 15 mm, and the loading rate 0.5 mm/min. At least three specimens for each point studied (cycle) were used. The results are shown in Table 1. The maximum strength of the sintered magnesia specimens with an increase in the HST from 0.3 to 2.0 GPa is increased by about 30%. We then determined the average grain size in the sintered specimens treated before sintering with a pressure of 0.3 and 2.0 GPa. For this the sintered specimens were cut and ground manually with the finest diamond paste (40/28, 10/7 and 1/0 /zm). The slides were chemically polished for 30-60 sec in boiling 85% H3PO4, and etched in the grain in a mixture of 2 parts 85 % I-I3PO4 + 1 part HzSO 4 at room temperature for 30-60 sec. The scanning electron microscope was used to obtain for each specimen at least 2-3 photomicrographs of the typical regions of the surface. The average grain sizes of the specimen were determined from the photomicrographs by the intersecting-lines method, with the averaged results of measurements for at least 300 grains for each section. The measurement error of the average grain sizes did not exceed 10% [7]." @default.
• W2604499810 created "2017-04-14" @default.
• W2604499810 creator A5037049734 @default.
• W2604499810 date "1992-01-01" @default.
• W2604499810 modified "2023-09-27" @default.
• W2604499810 title "EFFECT OF HYDROSTATIC TREATMENT OF POWDERS ON THE PHYSICAL PROPERTIES OF" @default.
• W2604499810 hasPublicationYear "1992" @default.
• W2604499810 type Work @default.
• W2604499810 sameAs 2604499810 @default.
• W2604499810 citedByCount "0" @default.
• W2604499810 crossrefType "journal-article" @default.
• W2604499810 hasAuthorship W2604499810A5037049734 @default.
• W2604499810 hasConcept C121332964 @default.
• W2604499810 hasConcept C134853933 @default.
• W2604499810 hasConcept C151730666 @default.
• W2604499810 hasConcept C159985019 @default.
• W2604499810 hasConcept C191897082 @default.
• W2604499810 hasConcept C192562407 @default.
• W2604499810 hasConcept C195702682 @default.
• W2604499810 hasConcept C2777581544 @default.
• W2604499810 hasConcept C2910081258 @default.
• W2604499810 hasConcept C543218039 @default.
• W2604499810 hasConcept C62520636 @default.
• W2604499810 hasConcept C86803240 @default.
• W2604499810 hasConcept C97355855 @default.
• W2604499810 hasConceptScore W2604499810C121332964 @default.
• W2604499810 hasConceptScore W2604499810C134853933 @default.
• W2604499810 hasConceptScore W2604499810C151730666 @default.
• W2604499810 hasConceptScore W2604499810C159985019 @default.
• W2604499810 hasConceptScore W2604499810C191897082 @default.
• W2604499810 hasConceptScore W2604499810C192562407 @default.
• W2604499810 hasConceptScore W2604499810C195702682 @default.
• W2604499810 hasConceptScore W2604499810C2777581544 @default.
• W2604499810 hasConceptScore W2604499810C2910081258 @default.
• W2604499810 hasConceptScore W2604499810C543218039 @default.
• W2604499810 hasConceptScore W2604499810C62520636 @default.
• W2604499810 hasConceptScore W2604499810C86803240 @default.
• W2604499810 hasConceptScore W2604499810C97355855 @default.
• W2604499810 hasLocation W26044998101 @default.
• W2604499810 hasOpenAccess W2604499810 @default.
• W2604499810 hasPrimaryLocation W26044998101 @default.
• W2604499810 hasRelatedWork W1970494870 @default.
• W2604499810 hasRelatedWork W1976487681 @default.
• W2604499810 hasRelatedWork W1988179185 @default.
• W2604499810 hasRelatedWork W2002427894 @default.
• W2604499810 hasRelatedWork W2094166305 @default.
• W2604499810 hasRelatedWork W2319793480 @default.
• W2604499810 hasRelatedWork W2324150629 @default.
• W2604499810 hasRelatedWork W2327289381 @default.
• W2604499810 hasRelatedWork W2331475317 @default.
• W2604499810 hasRelatedWork W2334813093 @default.
• W2604499810 hasRelatedWork W2348512643 @default.
• W2604499810 hasRelatedWork W2379119694 @default.
• W2604499810 hasRelatedWork W2414504098 @default.
• W2604499810 hasRelatedWork W2561180001 @default.
• W2604499810 hasRelatedWork W2608774003 @default.
• W2604499810 hasRelatedWork W2765944517 @default.
• W2604499810 hasRelatedWork W2788124761 @default.
• W2604499810 hasRelatedWork W2903071245 @default.
• W2604499810 hasRelatedWork W2910376870 @default.
• W2604499810 hasRelatedWork W2912877000 @default.
• W2604499810 isParatext "false" @default.
• W2604499810 isRetracted "false" @default.
• W2604499810 magId "2604499810" @default.
• W2604499810 workType "article" @default.