文章信息/Info

Title:

Strain glass and its novel properties

作者:

王宇; 周玉美; 紀(jì)元超; 任曉兵

西安交通大學(xué)前沿科學(xué)技術(shù)研究院 物質(zhì)非平衡合成與調(diào)控教育部重點(diǎn)實(shí)驗(yàn)室

Author(s):

WANG Yu;  ZHOU Yumei;  JI Yuanchao;  REN Xiaobing

Frontier Institute of Science and Technology, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University

關(guān)鍵詞:

金屬智能材料; 應(yīng)變玻璃; 形狀記憶合金; 馬氏體相變

DOI:

10.7502/j.issn.1674-3962.2016.06.01

文獻(xiàn)標(biāo)志碼:

A

摘要:

應(yīng)變玻璃是形狀記憶合金材料體系中發(fā)現(xiàn)的短程有序晶格應(yīng)變區(qū)域(納米應(yīng)變疇)的凍結(jié)態(tài)。它的宏觀物理性質(zhì)具有典型的玻璃化轉(zhuǎn)變特征，如動態(tài)凍結(jié)特性和非各態(tài)遍歷性；在微觀結(jié)構(gòu)上表現(xiàn)為母相基體中形成了許多隨機(jī)分布的納米應(yīng)變疇，但平均結(jié)構(gòu)不隨溫度改變。應(yīng)變玻璃表現(xiàn)出一些獨(dú)特的相變行為，如應(yīng)變玻璃的等溫馬氏體相變、應(yīng)變玻璃的應(yīng)力誘發(fā)馬氏體相變等。此外，該體系還具有許多功能特性，包括形狀記憶效應(yīng)、超彈性、彈熱效應(yīng)、阻尼效應(yīng)、力控阻尼效應(yīng)、Invar和Elinvar效應(yīng)，因此這類新型金屬智能材料具有很強(qiáng)的應(yīng)用潛質(zhì)。應(yīng)變玻璃合金獨(dú)特的納米應(yīng)變疇對溫度和外場的響應(yīng)導(dǎo)致了以上多功能特性的產(chǎn)生

Abstract:

Strain glass is a frozen state of short-range-ordered lattice strains (nano-sized strain domains), which is found in shape memory alloy systems. Its physical properties show typical glassy features such as dynamic freezing and non-ergodicity. Microscopically, it is characterized by many randomly distributed nano-sized strain domains embedded in parent matrix. However, its average structure does not change with temperature. The strain glass system exhibits some unique transforming behaviors such as isothermal transition from strain glass to martensite and stress induced transition from strain glass to martensite. Moreover, strain glass exhibits multi-functional properties including shape memory effect, superelasticity, elastocaloric effect, damping effect, stress controlled damping together with Invar and Elinvar effects, which demonstrate such a new kind of metallic intelligent material has big potential in application. The multi-functional properties of strain glass are closely related with its microstructure. They originate from the response of its nano-sized strain domains to the temperature and external field.