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lzb8628491铜虫 (小有名气)
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[交流]
咨询xrd测量金属玻璃自由体积结果分享
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以下是回信和我的咨询信，作者很好，马上就给我回了 Dear Lu, Our measurements are done in transmission with no scan stepts. The scattering entire 2-theta angular range is recorded at the same time (1 second to 30 seconds). If you use a lab source, you should work with light elements otherwise absorption will reduce your irrediated volume too much. For a lab source, I think one scan (0.025 degree steps), should take 8 hours but that depends a little on your machine. For sure, one-hour acquisitions are usually not enough. Good luck ARY > >>Dear Professor: >> I am a student of Lanzhou University, China. I has read some of >> your >> papers,which are about the measureement of free volume by X-ray >> diffraction. I noticed that the change of angular position of the >> first diffracted intensity maximum is very small after deformation or >> annealing than as cast sample, the change of 2 theta are about 0.04 >> degree. >> 1. Using high-energy, high-intensity synchrotron light, you has >> got >> significative data. could you tell me which scan step did you use for >> abtaining significative data? >> 2. we have a ordinary x-ray diffraction (not synchrotron, the >> smallest > scan >> step is 0.01 degree (2theta)). Is the diffraction suited for measuring >> free > volume >> of metallic glasses at as cast, deformation, and annealing states? >> Thank you for attention of my questions. >> Kind regards! >> yours Lu >> |
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lzb8628491
铜虫 (小有名气)
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2楼2007-07-04 12:12:54