共查询到20条相似文献,搜索用时 31 毫秒
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XRD与EBSD在钢板织构研究中的应用 总被引:3,自引:0,他引:3
介绍了X射线衍射(XRD)法和电子背散射衍射(EBSD)法的原理。结合实例阐述了两种方法在钢板织构研究中的应用特点。XRD法能从宏观角度得到钢板的织构信息,对优化钢板的生产工艺有指导意义。EBSD法主要是从微观的角度研究钢板中单个晶粒的取向及晶粒间的取向差,弥补了传统的XRD法在微观织构研究中的不足。两种方法在钢板织构研究中各有特色,互为补充。 相似文献
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新型Ti-Ni牙齿矫形丝的相变孙序何勇健(北京有色金属研究总院100088)关键词:X射线衍射相变形状记忆合金国产Ti-Ni牙齿矫形丝以其优良的超弹性用于牙齿矫形已多年,在临床使用中发现此材料尚有不足之处,如不易进行各种弯曲等,为此研制出一种新型Ti... 相似文献
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By the method of high-temperature reactions in solid phase, compounds with the general formula MII(AIII2/3U1/3)O3 (MII=Sr, AIII=Sc, In; MII=Ba, AIII=Sc, In, Y, Nd-Lu) were synthesized. Their structures (space groups Fmm and Pnma) were refined by the Rietveld method and morphotropic transition in Ba(Ln2/3U1/3)O3 on the border of Gd-Tb was discovered. By means of high-temperature X-ray diffraction, phase transitions were studied and thermal expansion coefficients were determined. 相似文献
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报道了用气态源分子束外延 (GSMBE)技术生长的InAlAs/InGaAs四阱耦合量子级联激光器 (QCL)材料的结构特性。X射线双晶回摆曲线谱测量结果表明所生长的QCL有源区的界面 (含 770层外延层 )、厚度达到单厚子层控制 ,组份波动≤ 1% ,晶格失配≤ 1× 10 - 3。采用特殊的优化工艺 ,Φ5 0mm外延片的表面缺路陷密度降至 1× 10cm- 2 ,达到了器件质量的要求。 相似文献
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Corrosion Products and Formation Mechanism During Initial Stage of Atmospheric Corrosion of Carbon Steel 总被引:3,自引:0,他引:3
The formation and development of corrosion products on carbon steel surface during the initial stage of atmospheric corrosion in a laboratory simulated environment have been studied by scanning electron microscopy (SEM) and Raman spectroscopy. The results showed that two different shapes of corrosion products, that is, ring and chain, were formed in the initial stage of corrosion. MnS clusters were found in the nuclei of corrosion products at the active local corrosion sites. The ring-shaped products were composed of lepidocrocite (γ-FeOOH) and maghemite (γ-Fe2O2 ) transformed from lepidocrocite. The chain-type products were goethite (α-FeOOH). A formation mechanism of the corrosion products is proposed. 相似文献
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1 前言研究X射线衍射线型的宽化,目的在于测定金属与合金材料的嵌镶块大小和点阵畸变。VOIGT函数方法基于高斯函数与柯西函数卷积的基础上建立起来的一种分析方法。这种方法将所用的计算公式改写成满足计算机要求的数学模型,把整个线型分析精度和分析过程的效率提高一步。为应用TRS-80型或PC-1500型微机进行衍射线型宽化分析,本文 相似文献
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