Physical Properties and Formation Mechanism of Copper/Glass Modified Laser Nanocrystals-Amorphous Reinforced Coatings

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• 作者：Jianing Li ; Huijun Yu ; Chuanzhong Chen ; Shuili Gong
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 7, 2013
• 年：2013
• 卷：117
• 期：9
• 页码：4568-4573
• 全文大小：464K
• 年卷期：v.117,no.9(March 7, 2013)
• ISSN：1932-7455

文摘

Amorphous surrounded nano polycrystals (ASNP) are found in this study. An amorphous nanocrystal-reinforced coating was fabricated on an important aeronautical material Ti-6Al-4V titanium alloy by laser cladding of the Al₃Ti-TiB₂-SiC-Cu-Y₂O₃ mixed powders. Transmission electron microscope and scanning electron microscope test results indicated that with Cu addition, the TiCu₂Al nano polycrystals were produced in the matrix of laser clad coating, which grew along (200), (220), (222), and (400) planes; high resolution transmission electron microscope image indicated that with glass addition, the particles grew up, leading to the formation of a micronano structure. Moreover, Cu addition led the agglomeration of ASNP to decompose then distributed uniformly in the coating matrix. This research provided essential theoretical and experimental basis to promote the application of laser cladding technique in the modern aviation industry.