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Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)

Master of Science in Materials Engineering

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Bibliographic Details
Main Author: Nurul Khairunnisa, Su
Other Authors: Banjuraizah, Johar, Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2018
Subjects:
Niobium oxide
Ceramic engineering
Zirconium oxide
Zirconia toughened alumina (ZTA)
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78008
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spelling my.unimap-780082023-03-06T07:06:13Z Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA) Nurul Khairunnisa, Su Banjuraizah, Johar, Dr. Niobium oxide Ceramic engineering Zirconium oxide Zirconia toughened alumina (ZTA) Master of Science in Materials Engineering Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA) was investigated. Various amount of Nb2O5 (0 - 7 wt.%) were added into ZTA separately through solid state method. The influences of Nb2O5 addition were investigated on the structural, microstructural and mechanical properties of ZTA ceramics. XRD analysis identified the presence of t-ZrO2, m-ZrO2 and Nb2Zr6O17 phase in this system. The presence of Nb2Zr6O17 phase found to deteriorate the properties of ZTA ceramic, which is related to the solubility limit of Nb2O5. The optimum value was achieve at 1 wt.% Nb2O5, which gives the highest value for Vickers hardness (1840 HV), fracture toughness (8.60 MPa.m1/2) and flexural strength (351 MPa). The lower porosity results in the enhancement of the mechanical properties. Dense body was obtained via CIP method with the relative density achieve 99.8% to the theoretical density. The crack associated from indentation technique related with the increasing of fracture toughness value due to the presence of crack deflection. The phase transformation (t → m) also occurs in this system and resulted in improvement for fracture toughness and flexural strength. The obtained values indicated that Nb2O5 found to improve the physical and mechanical properties of ZTA ceramic. Thus, the high strength and toughness of ZTA ceramic can be produced. 2018 2023-03-06T07:02:21Z 2023-03-06T07:02:21Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78008 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Materials Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Niobium oxide
Ceramic engineering
Zirconium oxide
Zirconia toughened alumina (ZTA)
spellingShingle Niobium oxide
Ceramic engineering
Zirconium oxide
Zirconia toughened alumina (ZTA)
Nurul Khairunnisa, Su
Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
description Master of Science in Materials Engineering
author2 Banjuraizah, Johar, Dr.
author_facet Banjuraizah, Johar, Dr.
Nurul Khairunnisa, Su
format Thesis
author Nurul Khairunnisa, Su
author_sort Nurul Khairunnisa, Su
title Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
title_short Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
title_full Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
title_fullStr Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
title_full_unstemmed Effect of niobium oxide (Nb2O5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (ZTA)
title_sort effect of niobium oxide (nb2o5) addition to the physical and mechanical properties of cold isostatic press zirconia toughened alumina (zta)
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2018
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78008
_version_ 1772813088982040576
score 13.222552

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