Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C

ABSTRACT In this study, an Al-Y coating was applied to enhance the property of oxidation resistance on the surface of γ-TiAl alloys by rf magnetron sputtering. The isothermal oxidation tests were investigated at 900 °C for 100 h. The coating characteristics and microstructure of coating after isothermal oxidation were inspected by XRD and SEM methods respectively, and coating bonding strength was investigated by scratch tester. Results show that Al2O3 and Y2O3 were produced on the surface of γ-TiAl alloys to enhance oxidation resistance during the isothermal oxidation test. Diffusion layer with rich element of Al provides abundant Al to surface for formation of a continuous Al2O3 layer which increases oxidation resistance effectively. Oxides of YAlO3 and YAG were formed during the oxidation tests, which were beneficial for the strength, hardness and fracture toughness of crystal grain of Al2O3. Furthermore, Element of Ti diffused into surface from substrate was restrained by Al because of the formation of TiAl3 and TiAl, which avoid the layer-broken by titanium oxides with porous structure

Saved in:
Bibliographic Details
Main Authors: Z G,Yang, W P,Liang, Q,Miao, R Y,Hu, Y P,Song
Format: Digital revista
Language:English
Published: Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro 2019
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000100302
Tags: Add Tag
No Tags, Be the first to tag this record!
id oai:scielo:S1517-70762019000100302
record_format ojs
spelling oai:scielo:S1517-707620190001003022019-07-03Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°CZ G,YangW P,LiangQ,MiaoR Y,HuY P,Song Oxidation behavior Magnetron sputtering High temperature Al-Y coating γ-TiAl alloy Diffusion ABSTRACT In this study, an Al-Y coating was applied to enhance the property of oxidation resistance on the surface of γ-TiAl alloys by rf magnetron sputtering. The isothermal oxidation tests were investigated at 900 °C for 100 h. The coating characteristics and microstructure of coating after isothermal oxidation were inspected by XRD and SEM methods respectively, and coating bonding strength was investigated by scratch tester. Results show that Al2O3 and Y2O3 were produced on the surface of γ-TiAl alloys to enhance oxidation resistance during the isothermal oxidation test. Diffusion layer with rich element of Al provides abundant Al to surface for formation of a continuous Al2O3 layer which increases oxidation resistance effectively. Oxides of YAlO3 and YAG were formed during the oxidation tests, which were beneficial for the strength, hardness and fracture toughness of crystal grain of Al2O3. Furthermore, Element of Ti diffused into surface from substrate was restrained by Al because of the formation of TiAl3 and TiAl, which avoid the layer-broken by titanium oxides with porous structureinfo:eu-repo/semantics/openAccessLaboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH2Matéria (Rio de Janeiro) v.24 n.1 20192019-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000100302en10.1590/s1517-707620190001.0649
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Z G,Yang
W P,Liang
Q,Miao
R Y,Hu
Y P,Song
spellingShingle Z G,Yang
W P,Liang
Q,Miao
R Y,Hu
Y P,Song
Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
author_facet Z G,Yang
W P,Liang
Q,Miao
R Y,Hu
Y P,Song
author_sort Z G,Yang
title Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
title_short Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
title_full Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
title_fullStr Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
title_full_unstemmed Oxidation Behavior of Al-Y Coating on γ-TiAl at 900°C
title_sort oxidation behavior of al-y coating on γ-tial at 900°c
description ABSTRACT In this study, an Al-Y coating was applied to enhance the property of oxidation resistance on the surface of γ-TiAl alloys by rf magnetron sputtering. The isothermal oxidation tests were investigated at 900 °C for 100 h. The coating characteristics and microstructure of coating after isothermal oxidation were inspected by XRD and SEM methods respectively, and coating bonding strength was investigated by scratch tester. Results show that Al2O3 and Y2O3 were produced on the surface of γ-TiAl alloys to enhance oxidation resistance during the isothermal oxidation test. Diffusion layer with rich element of Al provides abundant Al to surface for formation of a continuous Al2O3 layer which increases oxidation resistance effectively. Oxides of YAlO3 and YAG were formed during the oxidation tests, which were beneficial for the strength, hardness and fracture toughness of crystal grain of Al2O3. Furthermore, Element of Ti diffused into surface from substrate was restrained by Al because of the formation of TiAl3 and TiAl, which avoid the layer-broken by titanium oxides with porous structure
publisher Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
publishDate 2019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000100302
work_keys_str_mv AT zgyang oxidationbehaviorofalycoatingongtialat900c
AT wpliang oxidationbehaviorofalycoatingongtialat900c
AT qmiao oxidationbehaviorofalycoatingongtialat900c
AT ryhu oxidationbehaviorofalycoatingongtialat900c
AT ypsong oxidationbehaviorofalycoatingongtialat900c
_version_ 1756424575889965056

Similar Items