Celia S Chari, Richard R Hofer, Bryan W McEnerney, Steven M Arestie, Robert B Lobbia, Colleen M Marrese-Reading, Katherine T Faber
{"title":"电力推进用石墨/氢化硼双材料的评价。","authors":"Celia S Chari, Richard R Hofer, Bryan W McEnerney, Steven M Arestie, Robert B Lobbia, Colleen M Marrese-Reading, Katherine T Faber","doi":"10.1007/s44205-025-00126-0","DOIUrl":null,"url":null,"abstract":"<p><p>The performance of an innovative dielectric bimaterial is assessed for use in Hall-effect thrusters. The bimaterial consists of a structural body of graphite with a converted surface layer of hexagonal boron nitride (h-BN). The bimaterial couples the dielectric behavior and low emissivity of h-BN at its surface, with the thermal shock resistance and machinability of graphite at its core. In this paper, the performance of graphite/h-BN bimaterials synthesized from liquid-phase and vapor-phase carbothermic reactions of B<sub>2</sub>O<sub>3</sub> in nitrogen is compared and evaluated against the state-of-the-art wall material, bulk h-BN. Graphite/h-BN bimaterials synthesized through vapor-phase carbothermic reactions are shown to perform comparatively better than bimaterials synthesized through liquid-phase carbothermic reactions. The erosion rate of vapor-phase grown h-BN layers is similar to that of bulk h-BN with a sputtering yield of 0.021 mm<sup>3</sup>/C for xenon ions at 300 V.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s44205-025-00126-0.</p>","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"4 1","pages":"31"},"PeriodicalIF":0.0000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12058926/pdf/","citationCount":"0","resultStr":"{\"title\":\"Evaluation of Graphite/h-BN Bimaterials for Electric Propulsion.\",\"authors\":\"Celia S Chari, Richard R Hofer, Bryan W McEnerney, Steven M Arestie, Robert B Lobbia, Colleen M Marrese-Reading, Katherine T Faber\",\"doi\":\"10.1007/s44205-025-00126-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The performance of an innovative dielectric bimaterial is assessed for use in Hall-effect thrusters. The bimaterial consists of a structural body of graphite with a converted surface layer of hexagonal boron nitride (h-BN). The bimaterial couples the dielectric behavior and low emissivity of h-BN at its surface, with the thermal shock resistance and machinability of graphite at its core. In this paper, the performance of graphite/h-BN bimaterials synthesized from liquid-phase and vapor-phase carbothermic reactions of B<sub>2</sub>O<sub>3</sub> in nitrogen is compared and evaluated against the state-of-the-art wall material, bulk h-BN. Graphite/h-BN bimaterials synthesized through vapor-phase carbothermic reactions are shown to perform comparatively better than bimaterials synthesized through liquid-phase carbothermic reactions. The erosion rate of vapor-phase grown h-BN layers is similar to that of bulk h-BN with a sputtering yield of 0.021 mm<sup>3</sup>/C for xenon ions at 300 V.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s44205-025-00126-0.</p>\",\"PeriodicalId\":73724,\"journal\":{\"name\":\"Journal of electric propulsion\",\"volume\":\"4 1\",\"pages\":\"31\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12058926/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of electric propulsion\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/s44205-025-00126-0\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/5/7 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of electric propulsion","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s44205-025-00126-0","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/5/7 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
Evaluation of Graphite/h-BN Bimaterials for Electric Propulsion.
The performance of an innovative dielectric bimaterial is assessed for use in Hall-effect thrusters. The bimaterial consists of a structural body of graphite with a converted surface layer of hexagonal boron nitride (h-BN). The bimaterial couples the dielectric behavior and low emissivity of h-BN at its surface, with the thermal shock resistance and machinability of graphite at its core. In this paper, the performance of graphite/h-BN bimaterials synthesized from liquid-phase and vapor-phase carbothermic reactions of B2O3 in nitrogen is compared and evaluated against the state-of-the-art wall material, bulk h-BN. Graphite/h-BN bimaterials synthesized through vapor-phase carbothermic reactions are shown to perform comparatively better than bimaterials synthesized through liquid-phase carbothermic reactions. The erosion rate of vapor-phase grown h-BN layers is similar to that of bulk h-BN with a sputtering yield of 0.021 mm3/C for xenon ions at 300 V.
Supplementary information: The online version contains supplementary material available at 10.1007/s44205-025-00126-0.
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