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Problems of the starting and operating of hydraulic units and systems in low ambient temperature (Part I)

References Balawender A: Energy analysis and testing methods of lowspeed hydraulic motors (in Polish). Zeszyty naukowe PG (Scientific Bulletins of Gdansk University of Technology), Gdańsk 1988. Jasiński R: Operation of low-speed hydraulic motors in thermal shock conditions (in Polish). Doctoral thesis, Gdańsk 2002. Jasiński R: Experimental tests of PWK 27 axial multi-plunger pump of Hydrotor firm in low ambient temperatures (in Polish), "Napędy i sterowanie" No. 4

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Problems of the Starting and Operating of Hydraulic Components and Systems in Low Ambient Temperature (Part IV)
Modelling the Heating Process and Determining the Serviceability of Hydraulic Components during the Starting-Up in Low Ambient Temperature

BIBLIOGRAPHY 1. Balawender A.: Energy analysis and testing methods of slow-speed hydraulic motors (in Polish). Zeszyty Naukowe PG. Gdańsk 1988. 2. Jasiński R.: Operation of selected slow-speed hydraulic motors in thermal shock conditions (in Polish). Doctorate thesis, supervisor: A. Balawender. Gdańsk 2002. 3. Jasiński R.: Problems of the starting and operating of hydraulic components and systems in low ambient temperature (Part I). Polish Maritime Research, 4/2008. 4. Jasiński R.: Problems of the starting and operating of hydraulic

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Fabrication and thermal shock resistance of HfB2-SiC composite with B4C additives

Abstract

A HfB2 based ceramic matrix composite containing 20 vol.% SiC particles with 2 vol.% B4C as sintering additives was fabricated by hot-pressed sintering. The microstructure and properties, especially the thermal shock resistance of the composite were investigated. Results showed that the addition of B4C improved the powder sinterability and led to obtaining nearly full dense composite. The flexural strength and fracture toughness of the composite were 771 MPa and 7.06 MPam1/2, respectively. The thermal shock resistance tests indicated that the residual strength decreased significantly when the thermal shock temperature difference was higher than 600 °C. The large number of microcracks on the sample surface was the main reason for the catastrophic failure.

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Effect of Microbial Transglutaminase on Ice Cream Heat Resistance Properties – a Short Report

Abstract

The objective of this study was to investigate the effect of the addition of transglutaminase (TG) preparation Saprovia L ® (PMT TRADING Co. Ltd, Lodz, Poland) on the properties of ice cream with 40 g/kg and 70 g/kg fat content. TG was added at a concentration of 2 U/g protein. We studied the effect of transglutaminase on fresh and 3-month-stored at -25°C ice cream. Ice cream mixes were prepared with 5 g/kg stabilizer. Melting test was performed after thermal shocks until the “1st drop” occurrence. The amount of effluent was measured within the 0-120 min time frame. We evaluated the appearance of the samples and carried out the TPA and compression analysis. The addition of the enzyme has increased the resistance of stored ice cream to repeated thermal shocks.

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Problems of the starting and operating of hydraulic components and systems in low ambient temperature

References Balawender A.: Energy analysis and methodology of examination of low-speed hydraulic motors (in Polish). Zeszyty naukowe PG. Gdańsk 1988 Balawender A., Bieńkowski A.: Examining motors SOK 160 in thermal shock conditions. Report on stage IV of Agreement 780106 commissioned by ZUO Hydroster in Gdansk (in Polish); Gdansk 1981 Jasiński R.: Operation of low-speed hydraulic motors in thermal shock conditions (in Polish). PhD thesis, supervisor: A. Balawender. Gdańsk 2002

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Influence of epoxy resin curing systems and aluminium surface modification on selected properties of adhesive joints

-fatigue degradation on the mechanical properties of glass-reinforced composites. Pol. J. Chem. 18(1), 113-119. doi.org/10.1515/pjct-2016-0017. 19. Wang, J., Ganga, Rao, H., Liang, R. & Liu, W. (2003) Durability and prediction models of fiber-reinforced polymer composites under various environmental conditions: A critical review. J. Reinf. Plast. Compos. 35(3), 179-211. doi. org/10.1177/0731684415610920. 20. Kuczmaszewski, J. & Kłonica, M. (2015) Comparative researches of shearing strength of single-lap adhesive bonded joints 316l steel after „thermal

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Testing of thermal fatigue resistance of tools and rolls for hot working

of Fatigue, 26, pp. 1095-1107. [4] Amiable, S., Chapuliot, S., Constantinescu, A., Fissolo, A. (2006): A comparison of life time prediction methods for a thermal fatigue experiment. International Journal of Fatigue, 28, pp. 692-706. [5] Absi, J., Glandus, J.C. (2004): Improved methods for severe thermal shocks testing of ceramics by water quenching. Journal of European Ceramic society, 24, pp. 2835-2838. [6] Marsh, D.J. (1981): A thermal shock fatigue study of type 304 and 316 stainless steels. Fatigue of Engineering

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Problems of the starting and operating of hydraulic components and systems in low ambient temperature: Part II Determining the clearance between cooperating elements during the hydraulic components start-up in extremely low ambient temperatures on the grounds of experimental research

References Jasiński R.: Operation of low speed hydraulic motors in thermal shock conditions. Doctoral dissertation, thesis supervisor: A. Balawender. Gdańsk 2002. Jasiński R.: Research methodology of low speed hydraulic motors in thermal shock conditions , the IXth Seminar "Drives and control 2003", Gdańsk, February 2003. Jasiński R.: Analysis of permissible start-up parameters for hydraulic motors in thermal shock conditions , the Xth Seminar "Drives and control 2004", Gdańsk

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Characterization of cordierite-mullite ceramics prepared from natural raw materials

Abstract

Series of six cordierite-mullite ceramics were synthesized via solid state reaction at various temperatures from 1250 °C for pure cordierite to 1500 °C for pure mullite. Then the samples were submitted to the test of thermal shock resistance based on cycling heating-quenching procedure. X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Mercury intrusion porosimeter (MIP) have been used to characterize the samples before and after cycling heating-quenching method. Sample 6 was broken after 35 heating-quenching cycles, while the five other reminded stable. The refractoriness of samples is found to be higher than that of commercial ones. XRD shows that heating-quenching procedure has led to crystallization of cordierite and mullite phases. Apart from sample 6, the pore structure is stable with slight consolidation. The microstructure images confirm the results of XRD and MIP showing crack in sample 6 only, but compact and larger particles resulting from crystal growth in other samples due to the repeated action of heating.

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Thermal Barrier Coatings Manufactured by Suspension Plasma Spraying - A Review

., Bjorklund S., Performance testing of suspension plasma sprayed thermal barrier coatings produced with varied suspension parameters, Coatings 5 (2015) 338-356. 32. Marchand O., Bertrand P., Mougin J., Comminges C., Planche M.-P., Bertrand G., Characterization of suspension plasma sprayed solid oxy fuel cells electrodes, Surface and Coatings Technology 205 (2010) 993-998. 33. Fauchais P., Etchart-Salas R., Rat V., Coudert J.F., Caron N., Wittmann-Teneze K., Parameters controlling liquid plasma spraying: solutions, sols or suspensions, Journal of Thermal Spray

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