nickel;titanium | 105884-35-3

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 英文名称: nickel;titanium
• CAS: 105884-35-3
• 化学式: Ni₄Ti₃
• 分子量: 378.4
• InChiKey: WHDTWKLWOGLNNN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.02
• 重原子数：
  7
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  nickel titanium 以 neat (no solvent) 为溶剂， 生成 nickel;titanium
  参考文献：
  名称：

  溅射近等原子 NiTi 形状记忆薄膜退火过程中引起的结构和缺陷

  摘要：

  在通过射频磁控溅射制备的自支撑 NiTi 薄膜中研究了退火过程中引起的结构和缺陷。Ni4Ti3 与 (B2) 基体相结合的沉淀不会影响在 550°C 下短时间退火的薄膜的形状记忆行为。随着退火时间和/或温度的进一步增加，不连贯的 Ni4Ti3 析出物会形成并阻碍形状记忆行为。退火薄膜的脆化可能是由晶界沉淀、热蚀刻和应力梯度引起的。

  DOI：

  10.1063/1.117549

文献信息

• Synthesis of NiTi intermetallics by self-propagating combustion
  作者：C.L Yeh、W.Y Sung

  DOI：10.1016/j.jallcom.2003.12.016

  日期：2004.8

  The production of NiTi intermetallic compounds from elemental powder compacts was conducted by self-propagating high-temperature synthesis (SHS) in this study. Effects of initial sample density, preheating temperature, and Ni particle size on the combustion characteristics, as well as on the final composition and morphology of products were studied. For the samples with densities between 50 and 60% theoretical maximum density (TMD) under preheating temperatures in the range of 100-300 degreesC, the synthesis process showed two consecutive combustion stages, including the propagation of combustion front and the subsequent bulk combustion. Under these conditions, high-density products containing NiTi as the major phase with small amounts of secondary phases of NiTi2 and Ni3Ti were obtained. However, porous combustion products with a significant amount of unreacted Ni were produced from the 45% TMD samples under preheating temperatures of 100 and 150 degreesC, due to the lack of the second combustion stage. The amount of unreacted Ni in the final composition was greatly reduced by increasing the initial sample density and preheating temperature, or by using smaller Ni particles in the samples. In addition, the use of smaller Ni particles also led to an increase in the product density up to about 95% relative to the density of NiTi intermetallic. (C) 2004 Elsevier B.V. All rights reserved.
• The effect of solution treatment under loading on the microstructure and phase transformation behavior of porous NiTi shape memory alloy fabricated by SHS
  作者：Mehmet Kaya、Nuri Orhan、Bulent Kurt、Tahir I. Khan

  DOI：10.1016/j.jallcom.2008.07.023

  日期：2009.5

  Porous NiTi shape memory alloy (SMA) was fabricated by self-propagating high-temperature synthesis (SHS). With this study, a new solution treatment "solution treatment under loading" was applied to porous NiTi SMA fabricated by SHS to determine microstructural improvement regarding single phase NiTi. The effect of solution treatment under load on chemical composition, constituent phases and phase transformation behaviors of the specimens was investigated and discussed. The chemical composition of the specimens considerably changed with solution treatment under loading. Intermetallic phases such as Ti2Ni and Ni4Ti3 disappeared, the density of B2(NiTi) phase increased and phase transformation temperatures sharply decreased. Porous single phase B2(NiTi) SMA with high chemical homogeneity could be obtained by the load applied during solution treatment at 1050 degrees C. (C) 2008 Elsevier B.V. All rights reserved.
• Shape memory effect in sputtered Ti–Ni thin films
  作者：M.A. Arranz、J.M. Riveiro

  DOI：10.1016/j.jmmm.2004.11.396

  日期：2005.4

  The microstructure and electrical transport properties of Ti-Ni granular films have been investigated with X-ray diffraction and DC resistivity measurements, respectively. Samples with the eutectoid composition (similar to 50 at% Ni) were grown by RF magnetron sputtering on a heated sample holder. These films comprised Ti2Ni, TiNi3 and TiNi granular phases, their relative proportions and microstructures critically depending on the substrate temperature. A majoritary metastable TiNi phase was obtained in samples grown at temperatures above 600 degrees, as inferred from the discussion of the X-ray diffraction plots. These crystalline films showed the hysteretic behaviour of the electrical resistance which is attributed to the characteristic shape memory effect of such a binary alloy. Besides, the DC resistivity measurements are accomplished in Joule-heated samples by which efficiently modify their microgranular structure from amorphous to crystalline. or even stabilize the TiNi phase after a flash annealing. (c) 2004 Elsevier B.V. All rights reserved.
• Effect of quenching media on the properties of TiNi shape memory alloys fabricated by powder metallurgy
  作者：Ayman Elsayed、Junko Umeda、Katsuyoshi Kondoh

  DOI：10.1016/j.jallcom.2020.155931

  日期：2020.11

  TiNi shape memory alloys (SMAs) are one of the significantly important materials group, which serve in the advanced applications requiring unique characteristics. Although their wide use is well established, further improvement of mechanical properties is still needed. The conventional TiNi SMA is usually manufactured by casting, hot forging and heat treatment processes. In this study, Ti-x at.%Ni alloys, with x equals 50, 51, and 52, were fabricated by powder metallurgy (PM) process through spark plasma sintering, followed by hot extrusion, homogenization, solution, aging and cryogenic quenching treatment. The effects of the compositions, processing conditions, and quenching media on the microstructural and mechanical properties of the alloys were evaluated by XRD, SEM, TEM analyses and tensile hysteresis test. The results showed that hot extrusion could lead to a considerable grain refinement, while the cryogenic quenching lead to a shift in the transformation temperatures and to an improvement of the tensile properties of the alloys such as the tensile strength increment and marginally improved ductility. (C) 2020 Elsevier B.V. All rights reserved.