王家军
,
孙榆芳
,
叶锐曾
中国腐蚀与防护学报
研究了多弧离子镀Ｔｉ－Ｎ扩散障碍膜的表面形貌、组织结构及高温热稳定性．发现Ｔｉ－Ｎ膜表面存在大量颗粒物；颗粒物对Ｔｉ－Ｎ膜外磁控溅射涂覆的ＭＣｒＡＩＸ包覆型涂层的组织形态及性能有较大影响．Ｘ射线分析表明：Ｔｉ－Ｎ镀膜由δ－ＴｉＮ、ε－ＴｉＤＮ、α－Ｔｉ等多相组成；δ－ＴｉＮ呈明显｛１１１｝择优取向，但经扩散退火处理后，择优取向消失．１０００℃热时效试验结果表明Ｔｉ－Ｎ膜的高温热稳定性良好，与基体及相邻ＭＣｒＡＩＸ镀层间不发生显著互扩散，因而可作为扩散障碍层用于抑止或减缓合金元素在ＧＨ２２０基体及ＭＣｒＡｌＸ涂层间的互扩散．
关键词:
Ｔｉ－Ｎ镀膜
,
Preferred orientation
,
High temperature stability
Lihong Xue Youwei Yan
材料科学技术（英文）
Highly oriented barium titanate (BaTiO3) thin films on Pt substrate were fabricated by combination of electrophoretic deposition with hydrothermal treatment. The structure and morphology of thin films were characterized by X-ray diffraction and field-emission scanning electron microscopy. It is found that the titania precursor film, Ba(OH)2 oncentration and hydrothermal temperature play crucial roles in the film morphology and orientation. The BaTiO3 thin films with highly (110) preferred orientation can be formed on polycrystalline Pt substrate by appropriate adjustment of the reaction conditions. The orientation parameter f of highly oriented BaTiO3 films was up to 1.00. The films exhibited a smooth and crack-free surface and remained in the layered structure. In situ topotactic transformation and dissolution-crystallization mechanisms were proposed to explain the morphology and orientation of BaTiO3 films during hydrothermal treatment.
关键词:
Barium titanate
,
Preferred orientation
,
Electrophoretic deposition
,
Hydrothermal treatment
