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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/52170

Title: 利用機械合金法與不同成型途徑製備之(Zn4Sb3)100-x(Al2O3)x複合材料性質研究
Characterization of (Zn4Sb3)100-x(Al2O3)x Composite Materials Prepared by Mechanical Alloying and Different Consolidation Routes
Authors: Cheng, Yeh-Ming
鄭葉銘
Contributors: NTOU:Institute of Materials Engineering
國立臺灣海洋大學:材料工程研究所
Keywords: Zn4Sb3;γ-Al2O3;燒結;火花電漿燒結
Zn4Sb3;γ-Al2O3;sintering;spark plasma sintering
Date: 2018
Issue Date: 2019-05-23T06:19:39Z
Abstract: 摘要 本研究將不同重量百分比之γ-Al2O3加入Zn4Sb3中,在經高能量球磨5小時後製備出γ-Al2O3/ Zn4Sb3複合材料粉末,由於Zn4Sb3之Zn與Sb混合粉末經球磨後無法獲得單一Zn4Sb3合金相,因Zn粉是較易揮發性質,故添加過量0.6wt% Zn之Zn4Sb3則可製備出單一Zn4Sb3合金相,接著將此粉末以傳統燒結及SPS成型為塊材,前者是先將粉末在500及1000MPa下預壓成型後,再於473K下持溫30分鐘燒結,火花電漿燒結則是在673K及723K下,於100MPa壓力持溫15 分鐘。在傳統燒結後之Zn4Sb3複合塊材內部可觀察到γ-Al2O3顆粒散佈於Zn4Sb3基材上,但在因添加過多γ-Al2O3使塊材上出現裂痕及孔洞,導致緻密度下降,而在火花電漿燒結後的塊材內部也可觀察到γ-Al2O3顆粒,但裂痕及孔洞有減少的趨勢。由XRD結果可發現傳統燒結之塊材可出現單一之Zn4Sb3結晶相,但火花電漿燒結後的部分塊材則會出現ZnSb相繞射峰,而非完全的單一Zn4Sb3合金相。微硬度分析結果則顯示在673K進行火花電漿燒結的塊材比723K燒結者有較高的微硬度,其中又以添加3wt% γ-Al2O3者出現為最高之微硬度值達355HV。造成此種現象的原因可能是較高之火花電漿燒結溫度會使得晶粒成長,較大的晶粒進而導致微硬度下降。 關鍵字:Zn4Sb3、γ-Al2O3、燒結、火花電漿燒結
Abstract In this study, the different weight percentages of γ-Al2O3 were added to Zn4Sb3, and theγ-Al2O3/ Zn4Sb3 nanocomposite powder was prepared after high energy ball milling for 5 hours. Due to the Zn and Sb mixed powder of Zn4Sb3 cannot obtain a single Zn4Sb3 alloy phase after ball milling, because of the Zn powder with the volatile, synthesizing the single Zn4Sb3 alloy phase can be prepared by adding Zn4Sb3 with an excess of 0.6wt% Zn. Then the powder is formed into the bulk material by conventional sintering and spark plasma sintering (SPS). The temperature is maintained at 473 K for 30 minutes after the cold pressing at 500 and 1000 MPa. The temperature of spark plasma sintering is at 673 K and 723 K, maintaining at 100 MPa for 15 minutes. The internal of Zn4Sb3 nanocomposite bulk material after the conventional sintering, the γ-Al2O3 particles were observed to be dispersed on the Zn4Sb3 substrate. Due to the addition of the excessive amount of γ-Al2O3, causing many cracks and cavity were appeared on the surface of bulk material, resulting in a decrease in density. However, the γ-Al2O3 particles were observed inside the bulk material after the spark plasma sintering, but the cracks and cavity were reduced. From the XRD analysis result, it can be observed that some of the bulk material after the spark plasma sintering will have a ZnSb phase diffraction peak instead of a complete single Zn4Sb3 alloy phase. The micro-hardness analysis result showed that the bulk material of the spark plasma sintering temperature at 673K had higher micro-hardness than the temperature 723K, and the highest micro-hardness value of 355 HV was the addition of 3wt% γ-Al2O3. The reason for this phenomenon may be that the higher spark plasma sintering temperature causes the grain to grow, and the larger grains cause the micro-hardness to decrease. Keywords: Zn4Sb3; γ-Al2O3; cold pressing; sintering; spark plasma sintering
URI: http://ethesys.lib.ntou.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=G0010555010.id
http://ntour.ntou.edu.tw:8080/ir/handle/987654321/52170
Appears in Collections:[材料工程研究所] 博碩士論文

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