Degradation of Al^sub 4^C^sub 3^ Due to Atmospheric Humidity

The degradation of Al4C3 was investigated by exposing powder samples to atmospheric humidity at laboratory temperature for 150 days. Samples were monitored using powder x-ray diffraction analysis, scanning and transmission electron microscopy, thermal analysis, and energy-dispersive x-ray spectrosco...

Full description

Saved in:
Bibliographic Details
Published in:JOM (1989) 2018-10, Vol.70 (10), p.2378-2384
Main Authors: Nýblová, Daniela, Billik, Peter, Noga, Jozef, Šimon, Erik, Bystrický, Roman, Čaplovičová, Mária, Nosko, Martin
Format: Article
Language:English
Subjects:
Aluminum
Aluminum carbide
Boehmite
Carbon
Clay
Composite materials
Compressive properties
Corrosion
Crystal structure
Crystallinity
Degradation
Diffraction
Energy dispersive X ray spectroscopy
Energy transmission
Graphite
Humidity
Hydrogen bonds
Investigations
Laboratories
Mechanical properties
Plates (structural members)
Recrystallization
Scanning electron microscopy
Spectrum analysis
Temperature
Thermal analysis
Transmission electron microscopy
X ray powder diffraction
X-ray diffraction
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The degradation of Al4C3 was investigated by exposing powder samples to atmospheric humidity at laboratory temperature for 150 days. Samples were monitored using powder x-ray diffraction analysis, scanning and transmission electron microscopy, thermal analysis, and energy-dispersive x-ray spectroscopy. Initially, the degradation resulted in an amorphous Al-O-OH network, which gradually recrystallized as low-crystalline boehmite (γ-AlOOH), and, later, partially, as Al(OH)3. Low-crystalline γ-AlOOH consisted of plate-like particles with diameter of 5 μm to 40 μm. The 020 diffraction position of γ-AlOOH was close to that of well-crystalline γ-AlOOH, which may be explained by accumulation of compressive stress along the b-axis of the γ-AlOOH structure.
ISSN:1047-4838
DOI:10.1007/s11837-018-3053-3