Honors & Awards


  • Los Alamos Advanced Manufacturing Fellowship, Los Alamos National Laboratory (08/2018)

Professional Education


  • Bachelor of Arts, College Of Wooster (2016)
  • Doctor of Philosophy, Colorado School of Mines (2021)
  • BA, The College of Wooster, Physics (2016)
  • Ph.D, Colorado School of Mines, Materials Science (2021)

Stanford Advisors


Current Research and Scholarly Interests


X-ray diffraction methods, organic material characterization

All Publications


  • Invited review: Machine learning for materials developments in metals additive manufacturing ADDITIVE MANUFACTURING Johnson, N. S., Vulimiri, P. S., To, A. C., Zhang, X., Brice, C. A., Kappes, B. B., Stebner, A. P. 2020; 36
  • Calcium-magnesium aluminosilicate (CMAS) interactions with ytterbium silicate environmental barrier coating material at elevated temperatures CERAMICS INTERNATIONAL Wiesner, V. L., Scales, D., Johnson, N. S., Harder, B. J., Garg, A., Bansal, N. P. 2020; 46 (10): 16733-16742
  • Fatigue-resistant high-performance elastocaloric materials made by additive manufacturing SCIENCE Hou, H., Simsek, E., Ma, T., Johnson, N. S., Qian, S., Cisse, C., Stasak, D., Al Hasan, N., Zhou, L., Hwang, Y., Radermacher, R., Levitas, V. I., Kramer, M. J., Zaeem, M., Stebner, A. P., Ott, R. T., Cui, J., Takeuchi, I. 2019; 366 (6469): 1116-+

    Abstract

    Elastocaloric cooling, a solid-state cooling technology, exploits the latent heat released and absorbed by stress-induced phase transformations. Hysteresis associated with transformation, however, is detrimental to efficient energy conversion and functional durability. We have created thermodynamically efficient, low-hysteresis elastocaloric cooling materials by means of additive manufacturing of nickel-titanium. The use of a localized molten environment and near-eutectic mixing of elemental powders has led to the formation of nanocomposite microstructures composed of a nickel-rich intermetallic compound interspersed among a binary alloy matrix. The microstructure allowed extremely small hysteresis in quasi-linear stress-strain behaviors-enhancing the materials efficiency by a factor of four to seven-and repeatable elastocaloric performance over 1 million cycles. Implementing additive manufacturing to elastocaloric cooling materials enables distinct microstructure control of high-performance metallic refrigerants with long fatigue life.

    View details for DOI 10.1126/science.aax7616

    View details for Web of Science ID 000500039200040

    View details for PubMedID 31780556