Effect of sintering temperature on properties of Al2O3 whisker reinforced 3 mol% Y2O3 stabilized tetragonal ZrO2 (TZ-3Y) nanocomposites
Effect of sintering temperature on properties of Al2O3 whisker reinforced 3 mol% Y2O3 stabilized tetragonal ZrO2 (TZ-3Y) nanocomposites
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DOI：
10.1016/j.compositesb.2012.01.021
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发表时间：
2012-06-01
影响因子：
13.1
通讯作者：
Mehmood, Mazhar
中科院分区：
文献类型：
--
作者：
Abdullah, Muhammad;Ahmad, Jamil;Mehmood, Mazhar
本文研究了烧结温度对3mol %氧化钇稳定的含5、10、15和20 wt.%氧化铝晶须增强的四方氧化锆（TZ-3Y）复合材料密度和硬度的影响。首先在z - 3y复合材料中加入AACH晶须，并在1400、1500和1650℃的烧结温度下转化为氧化铝。结果表明，在所有烧结温度下，随着晶须浓度的增加，烧结密度减小，硬度增大。当晶须添加量为10 wt.%时，烧结温度为1500℃，硬度最高可达14.47 GPa，添加CTAB （1 wt.%）作为脱絮剂，硬度进一步提高到15.11 GPa。在1650℃烧结时，观察到硬度下降。这主要是由于晶须在高温下发生了形态变化，即晶须转变为富氧化铝晶粒。(C) 2012 Elsevier Ltd.版权所有。
In present study, effect of sintering temperature on density and hardness of 3 mol% yttria-stabilized tetragonal zirconia (referred to as TZ-3Y) composite reinforced with alumina whiskers (5, 10, 15 and 20 wt.%) has been studied. Initially, Ammonium Aluminum Carbonate Hydroxide (AACH) whiskers were added in TZ-3Y composite and transformed into alumina during sintering performed at different temperatures i.e. 1400, 1500 and 1650 degrees C. Results revealed that for all sintering temperatures, with increase in whisker concentration, sintered density decreased and hardness increased conversely. Maximum hardness of 14.47 GPa was achieved with 10 wt.% whiskers addition when sintered at 1500 C. However, with addition of CTAB (1 wt.%) as deflocculating agent the hardness was further improved to 15.11 GPa. While sintering at 1650 degrees C a decrease in hardness was observed. It was mainly due to high temperature morphological change of whiskers i.e. transformation of whiskers into alumina rich grains. (C) 2012 Elsevier Ltd. All rights reserved.