北航材料現(xiàn)代研究方法電子衍射補(bǔ)充(參考版)
2025-01-02 01:57本頁(yè)面
【正文】 多晶體電子衍射花樣指數(shù)標(biāo)定 多晶體電子衍射花樣指數(shù)標(biāo)定 ★ 復(fù)雜電子衍射花樣 多晶體電子衍射花樣指數(shù)標(biāo)定 Kikuchi lines Kikuchi line formation Kikuchi line formation More forward scattering – higher intensity Higher angle scattering – lower intensity Trace of the plane (halfway between the lines) Deficit line – closer to origin Excess line – farther from origin Kikuchi line formation What is the angle between the diffracting rays and the trace of the plane? QB If the trace of the plane is halfway between the klines, how far apart are the klines? 2QB Kikuchi line formation What happens if you rotate the crystal? ?Klines will move as though rigidly attached to the crystal. ?The scattering distribution will remain stationary. Kikuchi line formation Kikuchi line formation Kikuchi lines ? Kikuchi lines are due to inelastic scattering, thus you need a moderately thick sample to see the klines. ? Kikuchi lines are present in thin samples, but usually not visible. Kikuchi lines ? Excess line and deficit line are 2QB apart. ? The trace of the plane is down the middle of the kikuchi lines. ? Kikuchi lines also indicate the value and sign of s. 多晶體電子衍射花樣指數(shù)標(biāo)定 另外，復(fù)雜電子衍射花樣還包括二次電子 衍射 、 孿晶衍射 、 雙晶帶衍射等 . 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF
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