Characterization of reaction products of liquid Al and Mg3N2
PBN-AR
Instytucja
Instytut Metalurgii i Inżynierii Materiałowej im. Aleksandra Krupkowskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Inżynieria Materiałowa
ISSN
0208-6247
EISSN
Wydawca
Wydawnictwo Czasopism i Książek Technicznych SIGMA-NOT Sp. z o.o.
DOI
Rok publikacji
2013
Numer zeszytu
3
Strony od-do
162-164
Numer tomu
34
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0,19
Autorzy
(liczba autorów: 2)
Słowa kluczowe
EN
aluminium matrix composites in-situ reinforcement Mg3N2 AlN
Streszczenia
Język
EN
Treść
The paper presents an attempt to produce aluminium matrix composite reinforced with dispersed aluminium nitride (AlN) via reaction of liquid aluminium and magnesium nitride (Mg3N2). The latter was introduced into the metal bath in a form ofa green compact. It was expected that the introduction of Mg3N2 as an nitrogen-bearing substrate into Al melt would allow to obtain an in-situ reaction leading to a formation ofan aluminium nitride (AlN) reinforcing phase dispersed in the Mg-strengthened aluminium matrix. The produced material was investigated by means of X-ray diffraction measurements (XRD), light microscopy (LM), scanning electron microscopy (SEM) and microhardness tests. Microstructure investigations showed that absence of an external mixing of metal melt led to a formation of inhomogeneous structure of the casting: composite zone with about 90 vol. % of reinforcing particles of a size of ~20 um and an area of unreinforced aluminium. The composite area was localized in the initial area of Mg3N2 compact and its immediate vicinity. Energy Dispersive Spectrometry (EDS) analysis combined with X-ray diffraction (XRD) analysis of the casting confirmed presence of two main phase: aluminium solid solution (with up to 4 at. % ofMg) and aluminium nitride. Microhardness tests showed very high values of hardness in the composite zone, reaching up to about 500 HV, as compared with ~25 HV in the unreinforced Al region.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
662912