Predictive Modeling and Multi-response Optimization of Physical and Mechanical Properties of SCC Based on Sand’s Particle Size Distribution

AbstractOne of the major benefits of the Laser Powder Bed Fusion (LPBF) technology is the possibility of fabrication of complex geometries and features in only one-step of production. In the case of heat exchangers in particular, this is very convenient for the fabrication of conformal cooling channels which can improve the performance of the heat transfer capability. Yet, obtaining dense copper parts printed via LPBF presents two major problems: the high reflectivity of 1 μm (the wavelength of commonly used laser sources) and the high thermal conductivity of copper that limits the maximum local temperature that can be attained. This leads to the formation of porous parts.In this contribution, the influence of the particle size distribution of the powder on the physical and mechanical properties of parts produced via LPBF is studied. Three copper powders lots with different particle size distributions are used in this study. The effect on densification from two laser scan parameters (scan speed and hatching distance) and the influence of contours scans on the lateral surface roughness is reported. Subsequently, samples manufactured with the optimal process parameters are tested for thermal and mechanical properties evaluation.

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The Effect of Nature and Parameters of Particle Size Distribution of Graphite on Physical and Mechanical Properties of Polimer Composites based on Aromatic Poliamide

Фізика і хімія твердого тіла ◽

10.15330/pcss.17.4.611-620 ◽

2016 ◽

Vol 17 (4) ◽

pp. 611-620

Author(s):

H.O. Sirenko ◽

L.M. Soltys ◽

V.P. Svidersky ◽

I.V. Sulyma

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Wear Resistance ◽

Particle Size Distribution ◽

Size Distribution ◽

Physical And Mechanical Properties ◽

Aromatic Polyamide ◽

Ash Content ◽

Natural Graphite ◽

Distribution Parameters

The resultsof studies of the effect of nature and parameters of particle size distribution of graphite on physical and mechanical properties of polymer composites based on aromatic polyamide fenіlon C-2. The particle size of the filler and polymer for the theoretical gamma-distribution parameters (perimeter, thickness and diameter) have different values. Found the influence of fillers (natural graphite different bands), which differed ash content (5-15% and 0,05-2,5%), moisture and grinding fineness (dispersion) on the wear resistance of the samples of the polymer composite. There is non-linear connectionbetween the intensity and parameters graphite particles distribution.

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Physical and Mechanical Properties of Cement Pastes with Blended Binder Containing Fine Milled Glass

Materials Science Forum ◽

10.4028/www.scientific.net/msf.824.71 ◽

2015 ◽

Vol 824 ◽

pp. 71-76

Author(s):

Markéta Kočová ◽

Jaroslav Pokorný ◽

Milena Pavlíková ◽

Zbyšek Pavlík

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Particle Size Distribution ◽

Portland Cement ◽

Size Distribution ◽

Borosilicate Glass ◽

Physical And Mechanical Properties ◽

Fluorescence Analysis ◽

Pozzolanic Activity ◽

Cement Pastes

Physical and mechanical behaviour of cement pastes with partial Portland cement replacement by fine milled waste glass is researched in the presented paper. The tested pastes contain milled borosilicate glass in amount of 5, 10, 20, and 30 mass% of cement. The chemical composition of borosilicate glass and used Portland cement is accessed by XRF (X-Ray Fluorescence) analysis. For the milled glass, pozzolanic activity and particle size distribution are measured. Here, modified Chapelle test is used for evaluation of pozzolanic activity. Particle size distribution is measured on laser diffraction principle. Basic physical properties and mechanical properties are determined for samples cured 28 and 90 days in water in order to evaluate the kinetics of hydration process. The obtained results revealed the possible applicability of the tested borosilicate glass in the composition of cement-based composite materials.

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