Chinese Journal of Lasers, Volume. 30, Issue 11, 1053(2003)
Optical Absorbability of ZnO Nanopowders and Application in Surface-hardening of Materials
ZnO nanopowders were synthesized by thermal physical method, which present two types of morphology, such as nanoparticles and nanowhiskers. The produced tetrapod nanowhiskers usually show four needle-like feet that originate from the center of the polyhedron. The nanowhiskers display a fantastic optical property of absorbing light, which is totally different from the nanoparticles. The nanowhiskers can enhance the absorptive ability of coating for CO 2 laser beam. The results show that the hardness and depth on the laser-hardened surface of steel 5Cr5MoSiV are improved dramatically. Compared with laser-hardening by using absorbent without the nanowhiskers, the hardening only demanded an 800 W output for CO 2 laser, saving the power as 30%.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Optical Absorbability of ZnO Nanopowders and Application in Surface-hardening of Materials[J]. Chinese Journal of Lasers, 2003, 30(11): 1053