NSUF - Nuclear Science User Facilities

Tongjun Niu

Profile Information
Name
Ms. Tongjun Niu
Institution
Purdue University
Position
Graduate student
Biography

Education

B.S. in Material Chemistry, Sichuan University, Chengdu, P. R. China                Sept. 2013-June 2017

Ø  Overall GPA: 3.88/4.00 (93.7/100)      Ranking: 1/43

Ph.D. in Materials Engineering, Purdue University, U.S.                                                                                    Aug. 2017-present

Ø  GPA (in progress): 3.93/4.00

 

Publication

Ø  T. Niu, P. Zhang, G. Zheng, lin Liu, J. Deng, Y. Jin, Z. Jiao, X. Sun, Tuning the charge transition process of Eu2O3 nanorods by coupling with Ag nanoparticles for enhanced photocatalytic performance. J. Environ. Chem. Eng. 5, 2930–2936 (2017).

Ø  Y. F. Zhang, S. Xue, Q. Li, J. Li, J. Ding, T. J. Niu, R. Su, H. Wang, X. Zhang, Size dependent strengthening in high strength nanotwinned Al/Ti multilayers. Acta Mater. 175, 466–476 (2019).

Ø  C. Fan, Z. Shang, T. Niu, J. Li, H. Wang, X. Zhang, Dual Beam In Situ Radiation Studies of Nanocrystalline Cu. Materials. 12, (2019).

Ø  L. Liu, J. Deng, T. Niu, G. Zheng, P. Zhang, Y. Jin, Z. Jiao, X. Sun, One-step synthesis of Ag/AgCl/GO composite: A photocatalyst of extraordinary photoactivity and stability. J. Colloid Interface Sci. 493, 281–287 (2017).

 

Research Experience

Nanometal Group | Advisor: Prof. Xinghang Zhang                                      Aug. 2017-present

Project I: Mechanical properties of He irradiated nanotwinned (nt) Ag;

Project II: In-situ Kr irradiation on Cu-Ag-Co tri-phase nanocomposite thin film;

Project III: Thermal stability of CuAg/Fe multilayers;

Project IV: Radiation response and mechanical properties of nanoporous CrCoCuFeNi high entropy alloy (HEAs).

 

Nanomaterials Applications and Devices Laboratory | Sichuan University Dec. 2015-June 2017

Project I: Facile Synthesis of Eu(OH)3, and Eu2O3 Nanorods(NRs);

Project II: Tuning the Charge Transition Process of Eu2O3 for Effective Charge Generation and Separation;

Project III: Synthesis of ZnS Nanotubes(NTs)via Anions Replacement;

Project IV: One-Step Synthesis of Ag/AgCl/GO Composites and Its Photocatalysis Study.

 

Solar Energy Materials and Devices Laboratory | Sichuan University         Apr. 2015-May 2016

Project I:Synthesis of Novel Composite Back Electrode of CdTe Solar Cell.

(2015-2016 Sichuan University’s Undergraduate Training Programs for Innovation and Entrepreneurship, Outstanding Research Project)

 

Awards and Honors

Ø  1st Class of Excellent Undergraduate Graduation Thesis of Sichuan University (52/7800+)                                                 June.2017

Ø  Tang Lixin Scholarship (top 60 in all undergraduates and graduates at Sichuan University) Nov. 2016

Ø  National Scholarship (top 2%)                                                           Nov. 2014& Nov. 2015

Ø  1st Prize of National Mathematics Contest in Modeling, China (top 1.4%)                 Dec. 2015

Ø  Honorable Mention, Mathematical Contest in Modeling (MCM/ICM)                    Apr. 2016

Ø  Members of Yuzhang Wu Honored College of Sichuan University


Expertise
In Situ Ion Irradiation, Nanotwins, Transmission Electron Microscopy (TEM)
Publications:
"Dual Beam In Situ Radiation Studies of Nanocrystalline Cu" Cuncai Fan, Zhongxia Shang, Tongjun Niu, Jin Li, Haiyan Wang, Xinghang Zhang, Materials Vol. 12 [unknown] 2721 Link
Nanocrystalline metals have shown enhanced radiation tolerance as grain boundaries serve as effective defect sinks for removing radiation-induced defects. However, the thermal and radiation stability of nanograins are of concerns since radiation may induce grain boundary migration and grain coarsening in nanocrystalline metals when the grain size falls in the range of several to tens of nanometers. In addition, prior in situ radiation studies on nanocrystalline metals have focused primarily on single heavy ion beam radiations, with little consideration of the helium effect on damage evolution. In this work, we utilized in situ single-beam (1 MeV Kr++) and dual-beam (1 MeV Kr++ and 12 keV He+) irradiations to investigate the influence of helium on the radiation response and grain coarsening in nanocrystalline Cu at 300 °C. The grain size, orientation, and individual grain boundary character were quantitatively examined before and after irradiations. Statistic results suggest that helium bubbles at grain boundaries and grain interiors may retard the grain coarsening. These findings provide new perspective on the radiation response of nanocrystalline metals.
"Size dependent strengthening in high strength nanotwinned Al/Ti multilayers" Yifan Zhang, Sichuang Xue, Qiang Li, Jin Li, Jie Ding, Tongjun Niu, Ruizhe Su, Acta Materialia Vol. 175 2019 466 Link
Mechanical behavior of metallic multilayers has been intensively investigated. Here we report on the study of magnetron-sputtered highly textured Al/Ti multilayer films with various individual layer thicknesses (h = 1–90 nm). The hardness of Al/Ti multilayers increases monotonically with decreasing layer thickness without softening and exceeds 7 GPa, making it one of the strongest light-weight multilayer systems reported to date. High-resolution transmission electron microscopy and X-ray diffraction pole figure analyses confirm the formation of high-density nanotwins and 9R phases in Al layers. The density of nanotwins and stacking faults scales inversely with individual layer thickness. In addition, there is an HCP-to-FCC phase transformation of Ti when h ≤ 4.5 nm. The high strength of Al/Ti multilayers primarily originates from incoherent layer interfaces, high-density twin boundaries, as well as stacking faults.

About Us

The Nuclear Science User Facilities (NSUF) is the U.S. Department of Energy Office of Nuclear Energy's only designated nuclear energy user facility. Through peer-reviewed proposal processes, the NSUF provides researchers access to neutron, ion, and gamma irradiations, post-irradiation examination and beamline capabilities at Idaho National Laboratory and a diverse mix of university, national laboratory and industry partner institutions.

Privacy and Accessibility · Vulnerability Disclosure Program