Browsing by Subject "mechanical alloying"

Now showing 1 - 4 of 4

Access status: Open Access ,
Characteristics of an $Al-V_{2}O_{5}$ composite produced by powder metallurgy
(Wydawnictwa AGH, 2019) Skrzekut, Tomasz; Błaż, Ludwik
The paper presents the results of research on the $Al-V_{2}O_{5}$ composite manufactured by means of the mechanical alloying and powder metallurgy method. Observation of the microstructure and X-ray chemical composition (XRD) analysis of the composite after extrusion were carried out. One of the most desirable features of metallic composites - apart from mechanical properties - is their resistance to increased impact temperature. It was observed that the formation of intermetallic phases due to the chemical reaction between strengthening particles and the composite matrix depends primarily on the annealing conditions of the material. The hardness of the annealed samples, depending on the annealing temperature, were discussed with respect to the material microstructure transformation. Despite the high-temperature, annealing at 473-773K, the material hardness did not change significantly, and remained approx.125 HV. However, at higher annealing temperatures, i.e. 823K, the chemical reaction between the components leads to the formation of the $Al_{10}V$ particles and increases hardness.
Access status: Open Access ,
Copper matrix composites reinforced with titanium nitride particles synthesized by mechanical alloying and spark plasma sintering
(Wydawnictwa AGH, 2017) Franczak, Aleksandra; Karwan-Baczewska, Joanna
Copper matrix composites containing ceramic particles such as carbides, borides, or nitrides have attracted much attention over the last few years. The increased interest in such materials has mainly been created by their high electrical and thermal conductivity, good mechanical and tribological properties, and microstructural stability. Among other nitrides, the titanium nitride seems to be considered as an attractive reinforcement due to its high hardness, excellent electrical conductivity, and stability at high temperatures. Moreover, its good corrosion resistance proves the uniqueness of the TiN particles above any other nitrides. In this work, Cu-10 wt.% TiN composite powders were produced by mechanical alloying and sintered by the spark plasma sintering (SPS) technique under different temperatures. The morphology and powder particle size after mechanical synthesis were inspected by a scanning electron microscopy (SEM) for all of the powder samples, chemical composition analyses (EDS) were also performed. The hydrostatic method was used to measure the density of the composite samples to analyze the influence of milling time on the process of consolidation in the composite powders.
Access status: Restricted ,
Mechaniczna synteza stopu $Fe-Al$
(Data obrony: 2017-01-26) Bobek, Krzysztof
Wydział Inżynierii Mechanicznej i Robotyki
Access status: Restricted ,
Wytwarzanie stopów o wysokiej entropii metodą mechanicznej syntezy
(Data obrony: 2018-07-17) Bobek, Krzysztof
Wydział Inżynierii Metali i Informatyki Przemysłowej