硅酸盐学报Issue(12)：1621-1626,6.DOI:10.7521/j.issn.0454-5648.2013.12.04
激光近净成形不同颜色Al2O3陶瓷件微观组织及裂纹分析
Microstructure and Crack in Color Al2O3 Samples by Laser Engineered Net Shaping
摘要
Abstract
High-purity Al2O3 ceramic was formed on a Ti-6Al-4V substrate via laser engineered net shaping (LENS). The black and white thin-wall samples were produced, respectively. The microstructure and chemical elements of the samples’ cross section were analyzed by scanning electron microscope. The phase compositions of the original Al2O3 powder, the black sample and the white sample, the color difference of the samples and the relationship between the amount of surface cracks and the color of the samples were investigated. The results show that the black thin-wall sample has many evenly-distributed surface cracks, and the white thin-wall sample contains a few surface cracks only on the upper part. The formation process affects the volatility degree of oxide impurities in the particles, and the chemical elements and phase compositions in the samples. The emergence of the second phase is a major cause to obtain the black sample and promote the formation and propagation of the surface cracks in the black sample.关键词
氧化铝/激光近净成形/微观组织/裂纹Key words
alumina/laser engineered net shaping/microstructure/crack分类
通用工业技术引用本文复制引用
吴东江,孙垚贝,牛方勇,马广义,张磊,金洙吉..激光近净成形不同颜色Al2O3陶瓷件微观组织及裂纹分析[J].硅酸盐学报,2013,(12):1621-1626,6.基金项目
国家自然科学基金(51175061)；国家重点基础研究发展计划(2009CB724307)资助项目。 （51175061）
