近日，东莞理工学院中子散射技术工程研究中心在冶金材料领域的TOP期刊《Scripta Materialia》上发表题目为《Nano-precipitation leading to linear zero thermal expansion over a wide temperature range in Ti22Nb》的研究论文。论文介绍了在宽温域线性零膨胀钛合金特殊热膨胀性能形成机理方面取得的最新进展。论文的中子衍射实验依托东莞理工多物理谱仪完成，是多物理谱仪建成以来的首篇用户实验成果。多物理谱仪由东莞理工学院投资8000万元，与中国散裂中子源及香港城市大学共同研发建设，是国内首台中子全散射谱仪，也是中国散裂中子源第一台合作谱仪，其性能达到国际先进水平。

Recently, the Neutron Scattering Technology Engineering Research Center of DGUT published a research paper titled “Nano-precipitation leading to linear zero-thermal expansion over a wide temperature range in Ti22Nb” in “Scripta Materialia”, a top journal in the field of metallurgical materials. The paper described the recent progress in discovering a mechanism for the special thermal expansion properties of linear zero-thermal expansion titanium alloys over a wide temperature region. The neutron diffraction experiment in the paper was completed by relying on DGUT’s multi-physics spectrometer, which is the first user experiment achievement since the establishment of the multi-physics spectrometer. DGUT’s multi-physics spectrometer was jointly developed by DGUT (with an investment of RMB 80 million), the CSNS and the City University of Hong Kong. It is the first neutron total-scattering spectrometer in China and the first spectrometer of CSNS to be collaboratively developed in China. The performance of the spectrometer has reached the international advanced level.

论文第一作者为东莞理工学院机械工程学院王皓亮博士，通讯作者为机械工程学院孙振忠教授，共同通讯作者为比利时鲁汶大学Matthias Bönisch博士。合作作者中国散裂中子源殷雯研究员和徐菊萍博士为研究提供了有力的技术支持。其他合作作者机械工程学院的宋成浩博士、赵愈亮博士、联合培养博士生Daniel Lai等提供了有益的协助。

The first author of this paper is Dr. Wang Haoliang from the School of Mechanical Engineering of DGUT, the corresponding author is Prof. Sun Zhenzhong from the School of Mechanical Engineering of DGUT, and the co-corresponding author is Dr. Matthias Bönisch from the University of Leuven. The co-authors Yin Wen, a researcher from CSNS, and Dr. Xu Juping, provided strong technical support for the research. Other co-authors, including Dr. Song Chenghao, Dr. Zhao Yuliang, and doctoral student Daniel Lai, also provided great assistance.

（图1.Ti22Nb合金通过析出纳米尺寸第二相获得的宽温域零膨胀性能）

(Fig. 1. The zero-thermal expansion properties over a wide temperature region of Ti22Nb alloy obtained by precipitation of nanometer-sized second phase)

(图2.(a)不同状态Ti22Nb合金中子衍射谱线，(b)原位升降温XRD谱线，(c)母相及析出相衍射峰强度随温度演化规律)

(Fig. 2(a). Neutron diffraction spectra of Ti22Nb alloy in different states, (b) XRD spectra of in situ increasing and decreasing temperature, (c) evolution of diffraction peak intensity of parent phase and precipitated phase with temperature)