Design of negative/nearly zero thermal expansion behavior over a wide temperature range by multi-phase composite

Materials & Design

Huaiming Guo¹  Cong Wang²  Laifeng Li²  Shihai An³  Ping Song³  Huimin Han⁴  Jin Cui⁴  Rongjin Huang⁴  Ying Sun⁴  Xiuliang Yuan⁴  Kewen Shi⁴ 

[1] Corresponding authors.;Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, China;School of Physics, Beihang University, Beijing 100191, China;

关键词: Negative/nearly zero thermal expansion;    Mn-based anti-perovskites;    Intermetallics;    Composites;    Stability;   

DOI  :  

来源: DOAJ

【 摘 要 】

The negative thermal expansion (NTE) or nearly zero thermal expansion (NZTE) behaviors have been found in some magnetic metallic compounds with great application prospects. However, it is a big challenge for applications that the responding temperature range is not broad enough or far away from room temperature. Herein, a new method is put forward to design the wide temperature range of NTE and NZTE Behavior by NTE/NZTE multi-phase composite. In this method, the optimized volume fraction of the components achieves a concordant collaboration of multi-phase in the counteraction of NTE and positive thermal expansion (PTE) at several adjacent temperature ranges and thus the temperature range is broadened as expected. By this method, MnCuGeN-based NTE composite (290 K ≤ T ≤ 385 K, ΔT = 95 K) and MnCuZnSiGeN-based NZTE composite (200 K ≤ T ≤ 400 K, ΔT = 200 K) with excellent stability have been successfully designed and prepared. This idea will open an avenue to the multi-phase composite with designable NTE/NZTE properties, which would have important applications in aerospace and other modern industries.

【 授权许可】

Unknown