周钟瑔
,
李劲
,
李京
,
张立新
,
贺智端
,
柯伟
中国腐蚀与防护学报
采用示差扫描量热分析技术,研究了一种环氧树脂粉末涂料与酚醛改性的该种涂料的固化反应机制和两种涂膜的交联结构,并结合两种涂膜在90℃蒸馏水中的静态浸泡实验结果,分析了涂膜交联结构对涂膜吸水性的影响。 结果表明:酚醛改性环氧粉末涂料的固化反应包括酚醛树脂与一部分环氧树脂的共聚反应,环氧树脂与固化剂的交联反应,以及少量酚醛树脂的自聚反应。而环氧粉末涂料的固化反应只有环氧树脂与固化剂-双氰胺的交联反应。酚醛改性环氧粉末涂料由于两种树脂的共聚交联反应,增加了体系的交联密度,提高了涂膜耐介质渗透能力。在高温下适当延长改性涂料的固化时间,能使两种树脂反应更充分,交联结构趋于完善,从而进一步提高耐介质渗透能力。
关键词:
环氧树脂
,
Phenolic
,
Coating
,
Curing reaction
,
Water absorption
范瑞麟
中国腐蚀与防护学报
研究了K3合金上NiCrAlY-ZrO_2·8％Y_2O_3涂层在热腐蚀条件下的破坏行为。熔盐沿陶瓷层晶界向内渗透导致底层的腐蚀,以及Y_2O_3的酸性溶解导致ZrO_2由C相向M相的转变是热障涂层热腐蚀破坏的主要原因。某些工艺因素导致涂层破坏或不稳定会造成涂层过早地灾难性破坏。
关键词:
热障
,
Coating
,
Hot corrosion
Junwei Wu Xingbo Liu
材料科学技术（英文）
Interest in solid oxide fuel cells (SOFC) stems from their higher efficiencies and lower levels of emitted pollutants, compared to traditional power production methods. Interconnects are a critical part in SOFC stacks, which connect cells in series electrically, and also separate air or oxygen at the cathode side from fuel at the anode side. Therefore, the requirements of interconnects are the most demanding, i:e:, to maintain high electrical conductivity, good stability in both reducing and oxidizing atmospheres, and close coefficient of thermal expansion (CTE) match and good compatibility with other SOFC ceramic components. The paper reviewed the interconnect materials, and coatings for metallic interconnect materials.
关键词:
Solid oxide fuel cells (SOFC)
,
interconnect
,
spinel
,
coating
