MgO-CeO2-Y2O3改性ZrO2-Al2O3復(fù)相陶瓷性能研究

材料成型及控制工程論文，論文編號(hào):JX1391  論文字?jǐn)?shù):11466.頁數(shù):26

摘     要

 氧化鋁陶瓷是目前世界上生產(chǎn)量最大、應(yīng)用面最廣的工業(yè)陶瓷材料，具有十分誘人的應(yīng)用前景。但是,由于它具有高脆性和均勻性差等致命弱點(diǎn),影響了陶瓷零部件的工作可靠性和使用安全性,因此,提高氧化鋁陶瓷的韌性是亟待解決的重要問題。
 本文在ZrO2陶瓷增韌Al2O3陶瓷的基礎(chǔ)上，研究不同含量MgO、CeO2、Y2O3對(duì)ZrO2陶瓷增韌性能的影響，并在此基礎(chǔ)上研究Y離子穩(wěn)定ZrO2相變?cè)鲰gAl2O3陶瓷。結(jié)果得出：添加部分MgO后陶瓷體積密度得到了提高，隨著MgO添加量的增加，陶瓷的體積密度出現(xiàn)了先增大后減小的趨勢(shì)；CeO2的添加能夠有效提高ZrO2陶瓷的燒結(jié)性能，隨著CeO2添加量的增加，陶瓷的體積密度逐漸增大。CeO2雖然能細(xì)化ZrO2的陶瓷晶粒大小、促進(jìn)陶瓷的致密化，卻不能消除陶瓷中的裂紋；添加適量的Y2O3可以有效提高ZrO2陶瓷的燒結(jié)性能，隨著Y2O3含量的增加，ZrO2陶瓷的體積密度呈現(xiàn)先增加后減小的趨勢(shì)；采用 Y2O3 作穩(wěn)定劑, 且當(dāng) ZrO2 含量較小 ( <20%) , 有助于提高 ZTA 陶瓷的致密度；隨著3Y-ZrO2添加量的增加，陶瓷的晶粒逐漸細(xì)化。

關(guān)鍵詞：添加劑  氧化鋯  增韌  氧化鋁  陶瓷

Abstract
 Alumina ceramic is the world's production of the largest and broadest application of industrial ceramic materials, has a very attractive prospect. However, because of its high brittleness and poor uniformity of the Achilles heel, affecting the reliability of ceramic components and the use of the work of security, therefore, to improve the toughness of alumina ceramics is an important problem demanding prompt solution.
 In this paper, ceramic ZrO2 toughened Al2O3 ceramic on the basis of different contents of MgO, CeO2, Y2O3 ceramics of ZrO2 toughening performance, and based on this study the stability of Y-ion ZrO2 phase transformation toughening Al2O3 ceramics. Results: After adding some MgO ceramic bulk density has been enhanced, with the addition of MgO increases the size of the density of ceramics first appeared in the trend of increased and then decreased; CeO2 addition can effectively improve the sintering properties of ceramic ZrO2, With the addition of CeO2 increased the size of the density of ceramics increases. Although CeO2 ceramic ZrO2 refined grain size, and promote the densification of ceramic, but not the elimination of cracks in ceramics; add the appropriate amount of Y2O3 can effectively improve the sintering properties of ceramic ZrO2, Y2O3 With the increase of the content, ZrO2 ceramic volume density at first increased and then decreased trend; for the use of Y2O3 stabilizer, and smaller when the ZrO2 content (<20%), help to improve the density of ZTA ceramics; With the addition of 3Y- ZrO2 increases, ceramics gradually refined grains.
 
Keywords: Addition agent；Zirconia；Touqhening；Alumina；Ceramic；

目  錄
中文摘要 i
英文摘要 ii
目錄 iii
第一章     概述 1
 1.1  氧化鋁陶瓷 1
 1.2  氧化鋁陶瓷增韌技術(shù) 1
 1.3  ZrO2陶瓷結(jié)構(gòu)及增韌機(jī)理 3
 1.3.1  ZrO2陶瓷的相結(jié)構(gòu)與轉(zhuǎn)變 3
 1.3.2  ZrO2增韌機(jī)制 4
 1.4  各種添加劑對(duì)ZrO2性能的影響 4
 1.4.1  MgO對(duì)ZrO2性能的影響 4
 1.4.2  CeO2對(duì)ZrO2性能的影響 5
 1.4.3  Y2O3對(duì)ZrO2性能的影響 5
 1.5  氧化鋯增韌氧化鋁陶瓷材料的研究進(jìn)展 6
 1.6  立題依據(jù)和研究?jī)?nèi)容 6
 1.6.1  立題依據(jù) 6
 1.6.2  研究?jī)?nèi)容 6
第二章     實(shí)驗(yàn)與測(cè)試過程 7
 2.1  Mg-ZrO2陶瓷的配方及制備過程 8
 2.2  Ce-ZrO2陶瓷的配方及制備過程 9
 2.3  Y2O3-ZrO2陶瓷的配方及制備過程 9
 2.4  3Y-ZrO2/Al2O3復(fù)相陶瓷的配方及制備過程 10
第三章     結(jié)果分析 12
 3.1  Mg-ZrO2陶瓷的燒結(jié)性能 12
 3.1.1  Mg-ZrO2陶瓷燒結(jié)后的體積密度 12
 3.1.2  Mg-ZrO2陶瓷燒結(jié)后的掃描電鏡 13
 3.2  Ce-ZrO2陶瓷的燒結(jié)性能 15
 3.2.1  Ce-ZrO2陶瓷燒結(jié)后的體積密度 15
 3.2.2  Ce-ZrO2陶瓷燒結(jié)后的掃描電鏡 16
 3.3  Y2O3-ZrO2陶瓷的燒結(jié)性能 17
 3.3.1  Y2O3-ZrO2陶瓷燒結(jié)后的體積密度 17
 3.3.2  Y2O3-ZrO2陶瓷燒結(jié)后的掃描電鏡 18
 3.4  3Y-ZrO2/Al2O3復(fù)相陶瓷的燒結(jié)性能 18
 3.4.1  3Y-ZrO2/Al2O3復(fù)相燒結(jié)后的體積密度 18
 3.4.2  3Y-ZrO2/Al2O3復(fù)相燒結(jié)后的掃描電鏡 19
第四章     結(jié)論 21
致謝 22
參考文獻(xiàn) 23