High-Resolution Transmission Electron Microscopy
High-resolution transmission electron microscopy is the most powerful technique for direct imaging of atoms in nanoparticles. A conventional TEM usually has an image resolution of better than 0.2 nm and is very capable of resolving atomic scale structures of nanoparticles.
STEM and HRTEM study on matrix microstructure and oxide …
2023年4月1日 · The matrix structure and oxides in 11Cr ferritic/martensitic (F/M) ODS steel (Fe–11Cr–0.13C–1.3W–0.4Ni–0.3Ti–0.35Y 2 O 3) have been characterized by scanning transmission electron microscopy (STEM) and high resolution transmission electron microscopy (HRTEM). The matrix of 11Cr F/M ODS steel is composed of tempered martensite (major ...
Tem and hrtem characterization of nanostructured M50 type steel
1997年1月1日 · In this current work, we report the microstructural characterization of the M50 type bulk samples fabricated by hot pressing the precursor powders. Powders were synthesized using both methods mentioned above. In the co-reduction method, lithium triethyl borohydride was used here instead of sodium borohydride (4) as a reducing agent.
HRTEM Study of the Role of Nanoparticles in ODS Ferritic Steel …
2011年2月1日 · HRTEM observations of crystalline and partially crystalline nanoparticles larger than ~2 nm and amorphous cluster-domains smaller than ~2 nm provide an insight into the formation mechanism of nanoparticles/clusters in MA/ODS steels, which we believe involves solid-state amorphization and re-crystallization.
Crystal and interfacial structures of oxide nanoparticles in Fe-16Cr ODS ferritic steel fabricated by mechanical alloying (MA), hot extrusion, and heat treatment have been examined using high-resolution transmission electron microscopy (HRTEM) techniques.
steel have been examined using high-resolution transmission electron microscopy (HRTEM) techniques. Oxide nanoparticles with a complex-oxide core and an amorphous shell were observed. The crystal structure of complex-oxide core is identified to be mainly monoclinic Y 4Al 2O 9 (YAM) oxide compound.
HRTEM Study of Irradiation-Induced Cavities in Oxide
2013年8月13日 · HRTEM observations of post-irradiated steel reveal that the defective nanoparticles/clusters play a crucial role in enhancing radiation tolerance of oxide-dispersed ferritic steel by trapping the helium-inflated cavities at the particle/matrix interfaces.
TEM、HRTEM、STEM——透射电子显微镜的三驾马车 - 哔哩哔哩
2020年6月29日 · 几乎任何与材料相关的领域都要用到透射电镜，而最常用的三大透射电镜是：普通透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）和扫描透射电子显微镜 (STEM)。 本期内容介绍三者的殊与同。 重点解析在科研中如何适时的运用这三者？ TEM： 这里的TEM专指普通分辨率TEM。 其主要用来观察材料的微观形貌和结构，比如催化剂粉末的轮廓外形，纳米粒子的尺寸和形貌。 一般普通TEM的分辨率在几个纳米数量级。 下图1（多相粉末催化剂）、 …
Investigation of the Crystallographic Evolution Sequence of Nano ...
2024年8月10日 · In the present work, the crystal structures of Cu precipitates were systematically observed using HRTEM, and the mechanism for crystallographic evolution was established. The precipitation behavior of a Cu-bearing ultra-low carbon steel after a step-quenching heat treatment process was analyzed.
TEM and HRTEM study of oxide particles in an Al-alloyed high-Cr …
2017年3月1日 · The nanoparticles in an Al-alloyed high-Cr oxide dispersion strengthened (ODS) ferritic steel with Hf addition, i.e., SOC-16 (Fe-15Cr-2W-0.1Ti-4Al-0.62Hf-0.35Y 2 O 3), have been examined by transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM).