Microstructural effects on negative thermal expansion extending over a wide temperature range in β-Cu1.8Zn0.2V2O7

2018 ◽  
Vol 113 (18) ◽  
pp. 181902 ◽  
Author(s):  
N. Katayama ◽  
K. Otsuka ◽  
M. Mitamura ◽  
Y. Yokoyama ◽  
Y. Okamoto ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Negative Thermal Expansion ◽  
Temperature Range ◽  
Microstructural Effects

scholarly journals Negative Thermal Expansion over a Wide Temperature Range in Fe-Doped MnNiGe Composites

2018 ◽  
Vol 6 ◽  
Author(s):  
Wenjun Zhao ◽  
Ying Sun ◽  
Yufei Liu ◽  
Kewen Shi ◽  
Huiqing Lu ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Negative Thermal Expansion ◽  
Temperature Range

The tunable negative thermal expansion covering a wide temperature range around room temperature in Sn, Mn co-substituted Mn3ZnN

2020 ◽  
Vol 49 (30) ◽  
pp. 10407-10412
Author(s):  
Shugang Tan ◽  
Chenhao Gao ◽  
Cao Wang ◽  
Tong Zhou ◽  
Guangchao Yin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Room Temperature ◽  
Negative Thermal Expansion ◽  
Temperature Range

Based on anti-perovskite Mn3ZnN, the negative thermal expansion (NTE) temperature can be effectively broadened via co-substituting Sn, Mn.

Strong Negative Thermal Expansion of Cu2PVO7 in a Wide Temperature Range

2021 ◽  
Vol 33 (4) ◽  
pp. 1321-1329
Author(s):  
Naike Shi ◽  
Andrea Sanson ◽  
Qiang Sun ◽  
Longlong Fan ◽  
Alessandro Venier ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Negative Thermal Expansion ◽  
Temperature Range

Strong negative thermal expansion in the hexagonal polymorph of ScF3

CrystEngComm ◽  
2018 ◽  
Vol 20 (20) ◽  
pp. 2768-2771 ◽  
Author(s):  
Igor A. Kasatkin ◽  
Larisa B. Gulina ◽  
Natalia V. Platonova ◽  
Valeri P. Tolstoy ◽  
Igor V. Murin
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Negative Thermal Expansion ◽  
Normal Pressure ◽  
Temperature Range

A new hexagonal polymorph of scandium fluoride (ScF3) displays strong negative thermal expansion in a wide temperature range at normal pressure.

Enlarging the Temperature Range for Maximum Wear Resistance of TiNi Alloy Using a NTE Phase

2007 ◽  
Vol 539-543 ◽  
pp. 3261-3266 ◽  
Author(s):  
Iulian Radu ◽  
Dong Yang Li
Keyword(s):  
Wear Resistance ◽  
Thermal Expansion ◽  
Internal Stress ◽  
Frictional Heating ◽  
Negative Thermal Expansion ◽  
High Wear Resistance ◽  
Tini Alloy ◽  
Wear Loss ◽  
Second Phase ◽  
Temperature Range

The near-equiatomic TiNi alloy has been demonstrated to possess high wear resistance, which largely benefits from its pseudoelasticity (PE). However, the PE occurs only in a small temperature range, which makes the wear resistance of this alloy unstable as temperature changes, caused by environmental instability or frictional heating. Therefore, enlarging the working temperature of PE could considerably improve this alloy as a novel wear-resistant material. One possible approach is to develop a self-built temperature-dependent internal stress field by taking the advance of the difference in thermal expansion between the pseudoelastic matrix and a reinforcing phase. Such a T-dependent internal stress could adjust the martensitic transformation temperature to respond changes in environmental temperature so that the temperature range of PE could be enlarged, thus leading to a wide temperature range in which the minimum wear loss is retained. Research was conducted to investigate effects of an added second phase having a negative thermal expansion (NTE) coefficient on the wear resistance of a near-equiatomic TiNi alloy. It was demonstrated that the temperature range of this modified material in which the wear loss dropped was enlarged. In addition, the wear resistance of such a TiNi-matrix composite was on one order of magnitude higher than that of unmodified TiNi alloy.

Enhanced Negative Thermal Expansion Property Deduced by the Breaks of Superstructure

2021 ◽  
Vol 13 (4) ◽  
pp. 556-562
Author(s):  
Niu Zhang ◽  
Ming-Yi Wu ◽  
Ya-Ming Liu ◽  
Meng-Jie Yang ◽  
Ming-Ju Chao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Potential Application ◽  
Negative Thermal Expansion ◽  
Thermal Expansion Property ◽  
Expansion Property ◽  
Good Potential ◽  
Nested Structure

The HfV2O7/HfMo2O8 composite were prepared in situ. The phase, structure and thermal expansion property were analyzed. The results indicate the composite consist of cubic HfV2O7 and hexagonal HfMo2O8. The two types of structures were coexisted and mixed uniformly, and interacted with each other. The mutual nested structure suppressed the formation of 3×3×3 superstructure in HfV2O7 (RT) introduced by the reaction in situ. The promoted coupled rotation of quasi-rigid polyhedron units could enhance the negative thermal expansion (NTE) property. The HfV2O7/HfMo2O8 composite exhibits excellent NTE property from 250 to 673 K (at least) with CTE -3.09 × 10-6 K-1. The good NTE property and thermal stability over a wide temperature range, especially near the RT range, bring a good potential application in designing zero thermal expansion materials.

scholarly journals Isotropic Low Thermal Expansion over a Wide Temperature Range in Ti1–xZrxF3+x (0.1 ≤ x ≤ 0.5) Solid Solutions

2018 ◽  
Vol 57 (22) ◽  
pp. 14396-14400 ◽  
Author(s):  
Cheng Yang ◽  
Yugang Zhang ◽  
Jianming Bai ◽  
Peng Tong ◽  
Jianchao Lin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Solid Solutions ◽  
Wide Temperature Range ◽  
Temperature Range ◽  
Low Thermal Expansion

Linear Thermal Expansion of Lead-Free Piezoelectric K0.5Na0.5NbO3 Ceramics in a Wide Temperature Range

2011 ◽  
Vol 94 (8) ◽  
pp. 2273-2275 ◽  
Author(s):  
Barbara Malič ◽  
Helena Razpotnik ◽  
Jurij Koruza ◽  
Samo Kokalj ◽  
Jena Cilenšek ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Linear Thermal Expansion ◽  
Lead Free ◽  
Temperature Range

Study on Synthesis and Properties of the Hafnium Tungstate by CO2 Laser

2010 ◽  
Vol 154-155 ◽  
pp. 467-470
Author(s):  
Jun Ping Wang ◽  
Qing Dong Chen ◽  
Er Jun Liang
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Raman Spectra ◽  
Co2 Laser ◽  
Wide Temperature Range ◽  
Negative Thermal Expansion ◽  
Cubic Phase ◽  
Unusual Property ◽  
Potential Applications ◽  
Nano Rods

The crystal structure of hafnium tungstate displays unusual property of isotropic negative thermal expansion in a wide temperature range which brings about a number of important potential applications. In this work, densely packed hafnium tungstate blocks are rapid synthesized by CO2 laser. The result of XRD and Raman spectra show that the samples contain single cubic phase of α-HfW2O8 with space group P213. The SEM observations show that the sample is composed of nano-rods which grow horizontally on the surface and in the interior. The nano-threads in the interior are composed of densely packed nano-crystallites.

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