何凤梅
,
陈聪慧
,
杨景兴
,
黄娜
,
王晓叶
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.01.021
采用TG-DSC、XRD、SEM、ICP等分析手段,对某一典型多孔氮化硅样品进行4个不同温度点的静态和微动态连续氧化试验,最高氧化温度为1 400℃.结果表明:多孔氮化硅在0.1 MPa静态空气气氛下,800℃之前,氧化反应非常微弱,800℃以上可见明显的氧化反应,1 000℃以上氧化反应加剧,增重速率加快,并优先发生在表面与外部孔壁处,之后再发生在样品的内部孔隙处,氧化反应受界面处的化学动力学控制,以被动氧化为主,主要生成物是SiO2,属吸热反应.当生成的SiO2将氮化硅表面和孔壁处覆盖时,在其界面处,随着温度的进一步升高或时间的延长,会生成Si2N2O,且需要注意防范样品可能出现脆性断裂情况.此外,同等温度下,动态氧化气氛将加速氮化硅的氧化,特别是多孔和粉末状样品.
关键词:
氮化硅
,
多孔
,
氧化特性
,
高温
,
陶瓷材料
Liang LI
,
Naoto KOSHIZAKI
材料科学技术（英文）
This review summarizes the various techniques developed for fabricating nanotube arrays in porous anodic alumina membranes (AAMs). After a brief introduction to the fabrication process of AAMs, taking carbons, metals, semiconductors, organics, biomoleculars, and heterojunctions as typical examples, attention will be focused on the recently established methods to fabricate nanotubes in AAM, including electrochemical deposition, surface sol-gel, modified chemical vapor deposition, atomic layer deposition, and layer-by-layer growth. Every method is demonstrated by one or two reported results. Finally, this review is concluded with some perspectives on the research directions and focuses on the AAM-based nanotubes fields.
关键词:
Nanotube
,
Template
,
Anodic
,
alumina
,
membra
