2023年1月20日 · Here, we provide direct evidence of (1 1 ¯ 2) body-centred tetragonal (BCT) twinned martensite in carbon steels by transmission electron microscopy (TEM) investigation, and the increase in tetragonality with the C content matches X-ray diffraction (XRD) results.

2024年3月1日 · Two mutually perpendicular BCT twinned pairs are observed in TEM images. The atomic arrangement of mutually perpendicular BCT twinned pairs is consistent with the quenching pathway model. Different orientation relationships can be obtained through different transformation pathways and lattice rotations.

The samples were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), micro-Raman and photoluminescence (PL). The powder particles...

Lead-free films of Ba0.9Ca0.1TiO3 (BCT) films were prepared on the Pt/Ti/SiO2/Si substrate via the sol–gel method under three different annealing processes. The films prepared under the three...

2025年1月5日 · The in-situ neutron diffraction experiments during deuterium desorption seems to indicate a two-step phase transition first from FCC dihydride to BCT monohydride and second from BCT to BCC. These findings can significantly advance research aimed at designing novel and high-performing High-Entropy Alloys (HEAs) for solid-state energy storage ...

2016年4月20日 · In this paper, we introduce a new XRD method to determine the tetragonal ratios, and subsequently the different carbon contents, of the lath and plate martensites co-existing in hardened medium-carbon steel.

2023年5月31日 · In addition, X-ray diffraction (XRD) indicated a tetragonal phase for the samples. The XRD results were analyzed using Williamson-Hall and size strain plot methods to investigate the effect of calcium concentrations and synthesis methods on the strain and crystalline sizes of the BCT materials.

X-ray diffraction (XRD) studies reveal the formation of cubic structure for perovskite and cubic spinel structure for ferrite phases with crystallite sizes in the range of 17.79–28.21 nm.

2018年11月19日 · The XRD collects data from cube planes of different length, which manifests in the diffuse appearance of martensite lines. It is well known that due to the diffusionless austenite-to-martensite transformation, only one C atom is located in an octahedral interstice along the cube edge ( c -axis) in the martensite lattice.

2019年11月14日 · The phase and crystallographic orientations of BZT, BCT and BZT/BCT thin films were analyzed via x-ray diffraction (XRD) using a commercial Rigaku (D/Max-2200TB) diffractometer, operated at...