Search results

Work in agriculture has a variable nature, changing natural and climatic conditions, significant energy demand, which also results in the burden of mobile technology, the demand for higher performance, reduction of energy demand and environmental protection.
Tab. 1 Technical data of HARVELLA TX 10W40 oil Parameter Unit Value Density at 15°C kg.l-1 0.864 Kinematic viscosity at 40°C mm2.s-1 75 Kinematic viscosity at 100°C mm2.s-1 14.4 Flash point °C 220 Freezing point °C -30 Water hazard level - 0 For analysis, we took the working fluid from the tractor's hydraulic systemfrom the oil sump of the hydraulic system in the amount of 0.5 l, at the working temperature of the machine, while it is not possible to remove the oil from the filter of the hydraulic system, due to the design solution of the location of the oil filter.

Comparing to slag and fly ash, MK is more expansive, so low content of MK addition will be beneficial the cost reduction of construction industry and ideally improve the properties of concrete.
The acquired data was analysed by PANalytical X’pert Highscore Plus with PDF2004 database.

Duck eggshell powder waste was analyzed by x-ray diffraction (XRD, SHIMADZU XRD-700) and scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDS, JEM-6510LA, and FEI Inspect-S50), and was compared to chicken eggshell powder waste data.
Voids started to appear after the insertion of bio-CaCO3 particles, which correlates to a slight reduction in the tensile properties (tensile strength, modulus, and strain) (AT abaca/bio-CaCO3-5/epoxy, Fig. 4 c), indicating the composite is more brittle.

Several conventional methods have been used for the manufacture of nanoparticles, especially tin oxide nanoparticles (SnNPs), including the hydrothermal method, precipitation method, sol-gel method, hydrolysis, and chemical reduction.
The cuvette containing colloidal SnNPs was placed into the instrument and the data could be read after the UV-Vis instrument was operated.

On the other hand, the application of the precision casting method for the production of magnesium castings brings users many advantages, including weight reduction compared to aluminium alloys (about 30 %) and the availability of modern magnesium alloys, which outperform aluminium castings at increased operating temperatures (up to 250 ° C).
Table 3 Mechanical properties of samples from AZ91E alloy and WE43B alloy (tensile test) AZ91E Rm [MPa] Rp0,2 [MPa] A [%] WE43B Rm [MPa] Rp0,2 [MPa] A [%] average 233,3 139,2 2,5 average 275,7 190,0 5,9 ČSN EN 1753 240 150 2 LMT WE43B*) 220 172 2 *) Data from the material sheet of the manufacturer – Luxfer MEL Technologies, UK Table 4 Results of HBW 2.5/62.5 hardness measurement on castings from AZ91E and WE43B alloys Magnesium alloy the cast state heat treatment T6 AZ91E 53,4 ±1,11 66,1 ±2,24 WE43B 57,5 ±0,68 81,2 ±1,08 Summary As was documented above on the achieved results - with a reliable mastery of magnesium melt processing technology, it is possible to produce healthy magnesium castings with required properties and internal integrity from Mg-Al-based alloys (AZ91E) and Mg-Zr-based (WE43B cast iron) by precision casting into ceramics shells.

Each data point represents the average value of six measurements.
Because the reduction of the tensile strength due to calcium-chloride is caused only by 1.7 % w/w, whereas the degradation due to H2O is effected by 6 % w/w change in mass.

It has been demonstrated in the scholarly research [5] that there are declines in compressive strength associated with a reduction in FC density.
Using a heat map, the data used to discover which input characteristics have the most impact on compressive strength.

Results and discussion Analysis of weld simulation data showed that using low carbon steel inserts 20 mm in size caused the formation of a low-carbon layer (Fig. 3a).
Reducing the width of the weld transition zone and decreasing the volume fraction of brittle components cause a significant reduction in the tensile and comprehensive stresses which are 49 MPa and 79 MPa, respectively.

Further increase of the sintering temperatures to 1300ºC and 1400ºC result in the reduction of the pore size whereas the shape is predominantly spherical as shown in Figures 2b, d and f.
By comparison, the data available in the literature show that in most of the cases the size of the powder compact does not significantly affect the heating rate, level of densification and tensile strength of the sintered alloys.

Results of tensile tests provide information about ultimate tensile strength, yield stress, elongation, elastic limit, reduction in area, Young’s modulus, Poisson’s ratio, etc. [1].
However, available data in the literature mostly involve research reinforced polymer composites, e.g. [10, 12].