2024年9月15日 · Gradient Ta-doped material has been successfully synthesized via solid-state reaction method. Discharge capacity is elevated by increasing Ni 2+ /Ni 3+ redox couple activity. The formation of Ta-rich surface can optimize interfacial stability.

2018年5月30日 · In-situ TiC Ni 3 (Al,Ti) /Ni composites based on Ti 2 AlC Ni has been fabricated. Topotactically transformed TiC contributed to the refinement of Ni matrix grain. γ′-Ni 3 (Al,Ti) with grain size of about 100 nm precipitated from Ni alloy matrix. TiC Ni 3 (Al,Ti)/Ni composite exhibits excellent mechanical properties.

2015年1月1日 · Martensitic transformation in Ni 3 Ta intermetallic compound is accompanied by high temperature shape memory effect with complete shape recovery; while Nb and Co alloying additions lead to the deterioration of this effect due to the formation of the orthorhombic equilibrium (Pmmn) phase.

Ta exhibited a two-phase microstructure consisting of Ni 3 Ta particles in the L1 2 matrix. At room-temperature (RT), the hardness of the alloys with the L1 2 single-phase microstructure increased with increasing Ta content due to solid solution hardening of Ta.

2019年7月22日 · Both TiCx and Ni3(Al,Ti) content decreased from 60Ti3AlC2/Ni layer to 10Ti3AlC2/Ni layer in a stepwise manner was fabricated. The microstructural analysis indicates that no cracks, delamination and step-type abrupt changes occured in the graded layer of the manufactured FGM.

2024年4月2日 · Herein, the gradient Ta-doped Na0.78(Ni0.33Mn0.67)1-xTaxO2 (NMT) cathode material was synthesized via a one-step solid-state reaction method to overcome these obstacles. The Ta modification augments the Ni2+/Ni3+ redox couple activity, in accordance with the principle of charge conservation, thus bolstering the reversible capacity of the material.

2017年12月6日 · Microstructural features of a geometrically closed packed hexagonal η-Ni 3 (Ti, Al) phase precipitated in a long-term-aged Ni-based superalloy are characterised using various kinds of transmission electron microscope (TEM) techniques. The defect features in the η grain interior are clearly revealed at the atomic scale.

本文利用电子衍射及高分辨点阵象实验方法证实了Ni3 (Tix,V1-x)合金系在铸态下存在有9R,10H,16H,20H,21H,44H等长周期结构以及2H结构。 它们与体心四方基体相 (结构与Ni3V相同)及六角基体相 (结构与Ni3Ti相同)有固定取向关系: {001}长周期∥ {001} (Ni3Ti)∥ {112}Ni3V);〈100〉长周期∥〈100〉 (Ni3Ti)∥〈110〉 (Ni3V)。 样品经长期高温退火处理后其它长周期结构均向9R结构 …

本文通过一步固态反应法合成了梯度 Ta 掺杂 Na0.78（Ni0.33Mn0.67）1-xTaxO2 （NMT） 正极材料，以克服这些障碍。根据电荷守恒原理，Ta 改性增强了 Ni2+/Ni3+ 氧化还原对活性，从而增强了材料的可逆能力。

2019年12月2日 · A study of the Ni3+ ion in A1,0, is of considerable interest because the ground state of the ion is the strong field configuration (t6e'). The orbital degeneracy of this 'E ground state is not split by the trigonal field and consequently pronounced Jahn-Teller effects may be anticipated (Ham 1968, Englman 1972).