Structural aspect of chemical reaction between components of mechanically alloyed $Al-MoO_{2}$ and $Al-MoO_{3}$ composites
PBN-AR
Instytucja
Wydział Metali Nieżelaznych (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Journal of Alloys and Compounds (35pkt w roku publikacji)
ISSN
0925-8388
EISSN
1873-4669
Wydawca
Elsevier Science SA
DOI
Rok publikacji
2017
Numer zeszytu
Strony od-do
1096--1103
Numer tomu
695
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.57
Autorzy
Pozostali autorzy
+ 1
Słowa kluczowe
EN
powder metallurgy
mechanical alloying
hot deformation
metallic composite
Al-based composite
calorymetry test
Streszczenia
Język
EN
Treść
Mechanical alloying of aluminum powder with additions of 5 wt% MoO2 and MoO3 powders was used for producing Al-MoO2 and Al-MoO3 composites. Mechanical consolidation of as-milled composite powders was performed by means of preliminary pressing followed by the KOBO extrusion at 573 K and lambda = 44 cross-section reduction ratio. Dilatometry and differential scanning calorimetry tests at the temperature range of 293-973 K were performed to study the chemical reactions between composite components in the solid/liquid state. Structural observations revealed the presence of Al12Mo intermetallic grains that result from a combined chemical reaction between the matrix and reinforcements. The phase transformation was studied using X-ray diffractometry as well as transmission and scanning electron microscopy methods. Structural observations performed for as-extruded composites revealed similar microstructures for Al-MoO2 and Al-MoO3 composites. Residual, coarse aluminum powder grains were surrounded with a mixture of nano-sized structural components containing heavily refined molybdenum and aluminum oxides uniformly distributed within nano-grained aluminum matrix. Some unrefined molybdenum oxide particles were also locally observed. It was concluded that the utilized alloying time, 34 h, was not long enough to complete the milling procedure. (C) 2016 Elsevier B.V. All rights reserved.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:104535
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