Electrochemical corrosion of liquid phase sintered silicon carbide ceramics
Electrochemical corrosion of liquid phase sintered silicon carbide ceramics
复制标题
液相烧结碳化硅陶瓷的电化学腐蚀
DOI：
10.1002/maco.201106283
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Michaelis
中科院分区：
文献类型：
--
作者：
Herrmann;Kleebe;Michaelis
液相烧结碳化硅（LPS-SiC）是一种含有烧结添加剂的碳化硅陶瓷，在烧结过程中形成液相。这些添加剂在冷却过程中在晶界相中偏析。通常使用的Al 2 O3部分溶解在SiC颗粒中，因此改变了SiC的导电性（芯边结构）。本研究的重点是氧化钇和氧化铝作为烧结添加剂的LPS-SiC的电化学性能。LPS-SiC的电化学腐蚀行为已通过线性和循环伏安法在酸性和碱性溶液中测定。通过场发射扫描电子显微镜（FESEM）和能量色散X射线光谱（EDX）以及原子力显微镜（AFM）监测阳极氧化对材料的影响。所研究材料的核心-边缘结构在腐蚀脆弱性方面起着决定性作用。如果在阳极极化下发现发生氧化侵蚀，则其优先发生在SiC颗粒的边缘区域，而SiC颗粒的核心基本上不受影响。
Liquid‐phase sintered silicon carbide (LPS‐SiC) is silicon carbide ceramic which contains sintering additives forming a liquid phase during sintering. These additives segregate in the grain boundary phase during cooling. The usually used Al2O3dissolves partially in the SiC‐grains and therefore changing the conductivity of the SiC (core rim structure). This study is focused on the electrochemical properties of LPS‐SiC with yttria and alumina as sintering additives. Electrochemical corrosion behaviour of LPS‐SiC has been determined by linear and cyclic voltammetry in acidic and alkaline solution. The effect of anodic oxidation on the material has been monitored by field emission scanning electron microscopy (FESEM) and energy dispersive X‐ray spectroscopy (EDX) as well as by atomic force microscopy (AFM). The core‐rim structure of the investigated materials plays a decisive role in the vulnerability towards corrosion. If oxidative attack was found to occur under anodic polarization, it happened preferentially in the rim region of the SiC‐grains, while the core of the SiC‐grains remained basically unaffected.
DOI：
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发表时间：
2007
期刊：
影响因子：
--
作者：
G. Sauti;A. Can;D. McLachlan;M. Herrmann
通讯作者：
M. Herrmann
液相烧结 SiC 的纳米硬度与宏观硬度
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
M. Balog;P. Šajgalík;M. Hnatko;Z. Lenčéš;F. Monteverde;J. Keckes;Jow
通讯作者：
Jow