Gregory E. Hilmas

17.9k total citations · 4 hit papers
287 papers, 14.8k citations indexed

About

Gregory E. Hilmas is a scholar working on Mechanical Engineering, Ceramics and Composites and Materials Chemistry. According to data from OpenAlex, Gregory E. Hilmas has authored 287 papers receiving a total of 14.8k indexed citations (citations by other indexed papers that have themselves been cited), including 223 papers in Mechanical Engineering, 193 papers in Ceramics and Composites and 153 papers in Materials Chemistry. Recurrent topics in Gregory E. Hilmas's work include Advanced ceramic materials synthesis (193 papers), Advanced materials and composites (191 papers) and MXene and MAX Phase Materials (74 papers). Gregory E. Hilmas is often cited by papers focused on Advanced ceramic materials synthesis (193 papers), Advanced materials and composites (191 papers) and MXene and MAX Phase Materials (74 papers). Gregory E. Hilmas collaborates with scholars based in United States, Italy and Serbia. Gregory E. Hilmas's co-authors include William G. Fahrenholtz, Inna G. Talmy, James A. Zaykoski, Adam L. Chamberlain, Shi C. Zhang, Lun Feng, Sumin Zhu, Alireza R. Rezaie, Jeremy Watts and Eric W. Neuman and has published in prestigious journals such as Advanced Materials, Journal of Applied Physics and Acta Materialia.

In The Last Decade

Gregory E. Hilmas

278 papers receiving 14.3k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Refractory Diborides of Zirconium and Hafnium

2007 1.7k citations William G. Fahrenholtz, Gregory E. Hilmas et al. Journal of the American Ceramic Society profile →
Ultra-high temperature ceramics: Materials for extreme environments

2016 740 citations William G. Fahrenholtz, Gregory E. Hilmas profile →
High‐Strength Zirconium Diboride‐Based Ceramics

2004 724 citations William G. Fahrenholtz, Gregory E. Hilmas et al. Journal of the American Ceramic Society profile →
Ultra-high temperature ceramics for extreme environments

2023 131 citations Gregory E. Hilmas et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Gregory E. Hilmas United States	62	11.5k	10.4k	8.5k	1.9k	1.2k	287	14.8k
Omer Van der Biest Belgium	49	6.3k 0.5×	4.0k 0.4×	4.5k 0.5×	1.5k 0.8×	960 0.8×	431	9.6k
John J. Lewandowski United States	54	12.7k 1.1×	3.2k 0.3×	5.5k 0.6×	1.7k 0.9×	550 0.5×	266	14.0k
Andreas Mortensen Switzerland	51	7.2k 0.6×	2.6k 0.3×	3.8k 0.4×	3.1k 1.6×	784 0.7×	261	10.3k
Salvatore Grasso China	51	5.2k 0.5×	4.7k 0.5×	5.3k 0.6×	1.0k 0.5×	683 0.6×	226	8.8k
Akira Kawasaki Japan	45	4.5k 0.4×	2.7k 0.3×	3.3k 0.4×	1.7k 0.9×	729 0.6×	319	7.7k
F. F. Lange United States	59	5.2k 0.4×	6.6k 0.6×	5.1k 0.6×	1.9k 1.0×	1.1k 0.9×	176	10.6k
Zhijian Shen Sweden	45	6.9k 0.6×	2.4k 0.2×	3.8k 0.4×	631 0.3×	1.0k 0.9×	151	9.7k
Gilbert Fantozzi France	46	3.3k 0.3×	3.8k 0.4×	3.6k 0.4×	1.3k 0.7×	1.5k 1.3×	329	7.9k
Linan An China	52	3.3k 0.3×	4.0k 0.4×	5.2k 0.6×	773 0.4×	1.6k 1.4×	296	9.0k
Diletta Sciti Italy	51	6.6k 0.6×	6.8k 0.7×	4.8k 0.6×	1.0k 0.5×	366 0.3×	255	8.7k

Countries citing papers authored by Gregory E. Hilmas

Since Specialization

Citations

This map shows the geographic impact of Gregory E. Hilmas's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Gregory E. Hilmas with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Gregory E. Hilmas more than expected).

Fields of papers citing papers by Gregory E. Hilmas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Gregory E. Hilmas. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Gregory E. Hilmas. The network helps show where Gregory E. Hilmas may publish in the future.

Co-authorship network of co-authors of Gregory E. Hilmas

This figure shows the co-authorship network connecting the top 25 collaborators of Gregory E. Hilmas. A scholar is included among the top collaborators of Gregory E. Hilmas based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Gregory E. Hilmas. Gregory E. Hilmas is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Stacy, J. G., et al.. (2025). Spark plasma sintering of (Zr,Nb)C ceramics. Journal of Alloys and Compounds. 1013. 178630–178630.

Hassan, Rubia, William G. Fahrenholtz, Gregory E. Hilmas, & Jeremy Watts. (2025). Flexural strength of (Hf,Nb,Ta,Ti,Zr)B ₂ –(Hf,Nb,Ta,Ti,Zr)C high‐entropy dual‐phase ceramics. Journal of the American Ceramic Society. 109(1).

Zhou, Yue, Xiaoqing He, William G. Fahrenholtz, Gregory E. Hilmas, & S.J. McCormack. (2025). Densification of zirconium diboride with varying carbon additions. Journal of the European Ceramic Society. 45(7). 117250–117250. 1 indexed citations

Silvestroni, Laura, et al.. (2025). Compositionally complex diborides: Competing solubility during sintering and properties. Acta Materialia. 288. 120803–120803. 4 indexed citations

Fahrenholtz, William G., et al.. (2024). Hafnium oxide coating to improve the oxidation behavior of Zirconium Diboride. Journal of the European Ceramic Society. 44(15). 116774–116774. 1 indexed citations

Fahrenholtz, William G., et al.. (2024). Intermediate stage densification kinetics of high-entropy ceramics during spark plasma sintering. Journal of the European Ceramic Society. 45(5). 117136–117136. 5 indexed citations

Watts, Jeremy, et al.. (2024). Development of a highly loaded zirconium carbide paste for material extrusion additive manufacturing. Journal of the European Ceramic Society. 45(2). 116881–116881. 4 indexed citations

Hassan, Rubia, William G. Fahrenholtz, Gregory E. Hilmas, & Stefano Curtarolo. (2024). Synergistic hardening in a dual phase high‐entropy (Hf,Nb,Ta,Ti,Zr)C–(Hf,Nb,Ta,Ti,Zr)B ₂ ultra‐high temperature ceramic. Journal of the American Ceramic Society. 108(2). 7 indexed citations

Hilmas, Gregory E., et al.. (2024). Thermal and electrical properties of single‐phase high entropy carbide ceramics. Journal of the American Ceramic Society. 107(9). 5893–5902. 12 indexed citations

10.

Fahrenholtz, William G., et al.. (2024). Dual-phase ceramics based on multi-cation boride and carbide: Investigations at the nanoscale. Journal of Materiomics. 11(1). 100905–100905. 10 indexed citations

11.

Hilmas, Gregory E., et al.. (2024). Hardness of single phase high entropy carbide ceramics with different compositions. Journal of Applied Physics. 135(16). 12 indexed citations

12.

Filipović, Suzana, Nina Obradović, Gregory E. Hilmas, et al.. (2024). A super‐hard high entropy boride containing Hf, Mo, Ti, V, and W. Journal of the American Ceramic Society. 107(7). 4430–4435. 12 indexed citations

13.

Fahrenholtz, William G., et al.. (2023). Oxidation behavior of Nb-coated zirconium diboride. Journal of the European Ceramic Society. 43(12). 5174–5182. 2 indexed citations

14.

Filipović, Suzana, et al.. (2023). Final‐stage densification kinetics of direct current–sintered ZrB ₂. Journal of the American Ceramic Society. 106(10). 5654–5661. 5 indexed citations

15.

Feng, Lun, et al.. (2023). Strength retention of single‐phase high‐entropy diboride ceramics up to 2000°C. Journal of the American Ceramic Society. 107(3). 1895–1904. 14 indexed citations

16.

Zhou, Yue, William G. Fahrenholtz, Joseph Graham, & Gregory E. Hilmas. (2022). First‐principles study of the thermal properties of Zr ₂ C and Zr ₂ CO. Journal of the American Ceramic Society. 105(7). 4921–4929. 2 indexed citations

17.

Zhou, Yue, William G. Fahrenholtz, Joseph Graham, & Gregory E. Hilmas. (2021). From thermal conductive to thermal insulating: Effect of carbon vacancy content on lattice thermal conductivity of ZrC. Journal of Material Science and Technology. 82. 105–113. 29 indexed citations

18.

Crespillo, Miguel L., Xiaoqing He, Tommi White, et al.. (2020). The irradiation response of ZrC ceramics under 10 MeV Au3+ ion irradiation at 800 ºC. Journal of the European Ceramic Society. 40(5). 1791–1800. 46 indexed citations

19.

Zhou, Yue, et al.. (2019). Carbon vacancy ordering in zirconium carbide powder. Journal of the American Ceramic Society. 103(4). 2891–2898. 19 indexed citations

20.

Hilmas, Gregory E., et al.. (2005). Silicon Carbide Ceramics for Aerospace Applications- Processing, Microstructure, and Property Assessments. Materials Science and Technology. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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