John Hellmann

Profile Photo
Image
Email
Affiliate Researcher
Titles and Affiliations
Senior Associate Dean for Graduate Education and Research, College of Earth & Mineral Sciences
Professor, Materials Science and Engineering

Research Summary

Development and characterization of materials for gas turbines, advanced propulsion systems, and enhanced oil and natural gas recovery technology, as well as in the design and fabrication of laminated ceramic composites possessing engineered stress states

In the News

Research Keywords

 These keywords and phrases come from the publications and other research output of this person. See other researchers related to these topics by clicking on any keyword.

Recent Publications

A methodology for the accurate measurement of uniaxial compressive creep of refractory ceramics

Longhin, M. E., Shelleman, D. L. & Hellmann, Jr., J. R., Dec 1 2017, In: Measurement: Journal of the International Measurement Confederation. 111, p. 69-83 15 p.

Research output: Contribution to journalArticlepeer-review

SiAlON ceramics from preceramic polymers and nano-sized fillers: Application in ceramic joining

Bernardo, E., Parcianello, G., Colombo, P., Adair, J. H., Barnes, A. T., Hellmann, J. R., Jones, B. H., Kruise, J. & Swab, J. J., Jun 2012, In: Journal of the European Ceramic Society. 32, 7, p. 1329-1335 7 p.

Research output: Contribution to journalArticlepeer-review

SiAlON-SiC sandwich structures with tailored surface compression

Hoff, K., Green, D. J., Jin, Y., Ryba, E. & Hellmann, J. R., Jan 2012, In: International Journal of Applied Ceramic Technology. 9, 1, p. 91-99 9 p.

Research output: Contribution to journalArticlepeer-review

Experimental and finite element analysis of the API RP60 test

Harris, J. T., Segall, A. E., Hellmann, J. R., Scheetz, B. E., Koseski, R. P. & Boyce, J. M., May 1 2011, In: Journal of Testing and Evaluation. 39, 3

Research output: Contribution to journalArticlepeer-review

Temperature dependent elastic properties of several commercial glasses

Selverian, J., Johnston, D., Johnson, M. A., Fox, K. M. & Hellmann, J. R., May 31 2010, In: High Temperatures - High Pressures. 39, 1, p. 1-9 9 p.

Research output: Contribution to journalArticlepeer-review

Microstructure and creep behavior of silicon nitride and SiAlONs

Fox, K. M. & Hellmann, J. R., Mar 1 2008, In: International Journal of Applied Ceramic Technology. 5, 2, p. 138-154 17 p.

Research output: Contribution to journalArticlepeer-review

Correlations between free volume and pile-up behavior in nanoindentation reference glasses

Howell, J. A., Hellmann, J. R. & Muhlstein, C. L., May 15 2008, In: Materials Letters. 62, 14, p. 2140-2142 3 p.

Research output: Contribution to journalArticlepeer-review

Nanomechanical properties of commercial float glass

Howell, J. A., Hellmann, J. R. & Muhlstein, C. L., Apr 1 2008, In: Journal of Non-Crystalline Solids. 354, 17, p. 1891-1899 9 p.

Research output: Contribution to journalArticlepeer-review

Refinement of the α-phase area in the Yb-SiAlON system

Fox, K. M., Hellmann, J. R., Angelone, M. S. & Yeckley, R. L., May 1 2007, In: Journal of the American Ceramic Society. 90, 5, p. 1607-1610 4 p.

Research output: Contribution to journalArticlepeer-review