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Laser shock peening was primarily adopted as a pretreatment prior to plasma nitriding for 42CrMo steel. It was found that laser shock peening had obvious enhancement effect on plasma nitriding. The thickness of compound layer and effective hardening layer could be effectively improved under the same plasma nitriding condition, which was about twice thicker as that of conventional plasma nitriding...
Eu 3+ , Dy 3+ co-doped LiYF 4 single crystal capable of generating white light by simultaneous emission of red, green, and blue emitting fluorescent centers has been produced for the first time. Both chromaticity coordinates and photoluminescence intensity vary with the excitation wavelengths. Under 363nm, 385nm and 395nm excitation, the crystal shows excellent white light...
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