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Plasma-Infusion for Advanced Materials in Space Propulsion and Fusion Energy
Plasma-Infusion for Advanced Materials in Space Propulsion and Fusion Energy
Plasma-Infusion for Advanced Materials in Space Propulsion and Fusion Energy

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자료유형  
 학위논문 서양
최종처리일시  
20250211153126
ISBN  
9798346855798
DDC  
629.1
저자명  
Sabiston, Graeme.
서명/저자  
Plasma-Infusion for Advanced Materials in Space Propulsion and Fusion Energy
발행사항  
[Sl] : University of California, Los Angeles, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
203 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
주기사항  
Advisor: Wirz, Richard E.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2024.
초록/해제  
요약Generation and confinement of high-energy plasmas require materials that reduce wall-borne plasma contamination and provide desirable device lifetimes. A new category of materials, referred to as volumetrically complex materials (VCMs), have showcased robustness in extreme plasma environments [1, 2]. However, further investigation is needed to elucidate the physical principles that govern this behavior and to begin the process of designing and optimizing VCMs for varying plasma settings. Advancing the understanding of the plasma-material interactions (PMI) relevant to VCMs necessitates a comprehensive analysis of interconnected, spatially and temporally evolving mechanisms, including plasma-infusion, sputterant transport, and charged species behavior. High energy density applications such as fusion and advanced space propulsion technologies exhibit high plasma densities near the wall that lead to life and performance challenges. For VCM surfaces, these conditions lead to fully infused plasma conditions that can be exploited to improve material life and system performance. This research uses a combined experimental, computational, and theoretical approach to understand the underlying plasma-infusion physics and plasma material interactions for material design and optimization.A reduced-order simulation framework of sputtering based upon binary-collision approximation (BCA) data uniquely predicts sputter yields and analyzes material transport within plasma-facing VCMs [3]. This approach, grounded in the validated BCA code TRI3DYN, addresses key limitations in existing models by accurately capturing ion-solid interaction physics not accounted for in existing analytical methods.This simulation framework is then extended to analyze sputtering mitigation in EP vacuum chambers, demonstrating how volumetrically complex materials reduce sputterant deposition and optimize chamber design for reliable in-space propulsion [4].Advanced methods such as additive manufacturing are an attractive approach to creating optimal VCMs, however, additional considerations must be taken into account in the design phase in order to accommodate this process. Steel cage VCMs were created via laser powder bed fusion additive manufacturing, and underwent sputtering erosion [5]. Artifacts such as track-width overrun, spalling, and voids were noted. While Li and Wirz [1] demonstrated reduced sputter yield in VCMs, the transport of sputtered material within them remains largely unexplored; this is especially true for VCMs in non-plasma-facing infusion regimes. Recent sputtering experiments on stochastic aluminum foam VCMs, analyzed through X-ray tomography and SEM [6], provide insight into sputter deposition in forward and back-scattered directions, as well as the degradation of VCM structures and surface features in transitional, and plasma-infused regimes.Using the results from the abovementioned investigations, a canonical plasma-infusion experiment was developed to directly interrogate the subsurface plasma material interactions. Ultimately, the resulting analysis of the intra-VCM plasma transport led to the discovery that the negative density gradient into the material resulted in the full range of plasma-infusion conditions from fully-infused to transitional to plasma-facing.
일반주제명  
Aerospace engineering
일반주제명  
Plasma physics
일반주제명  
Materials science
일반주제명  
Computational physics
키워드  
Fusion energy
키워드  
Infusion
키워드  
Space propulsion
키워드  
Sputtering
키워드  
Plasma environments
기타저자  
University of California, Los Angeles Aerospace Engineering 0279
기본자료저록  
Dissertations Abstracts International. 86-06B.
전자적 위치 및 접속  
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■020    ▼a9798346855798
■035    ▼a(MiAaPQ)AAI31765348
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a629.1
■1001  ▼aSabiston,  Graeme.
■24510▼aPlasma-Infusion  for  Advanced  Materials  in  Space  Propulsion  and  Fusion  Energy
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a203  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-06,  Section:  B.
■500    ▼aAdvisor:  Wirz,  Richard  E.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2024.
■520    ▼aGeneration  and  confinement  of  high-energy  plasmas  require  materials  that  reduce  wall-borne  plasma  contamination  and  provide  desirable  device  lifetimes.  A  new  category  of  materials,  referred  to  as  volumetrically  complex  materials  (VCMs),  have  showcased  robustness  in  extreme  plasma  environments  [1,  2].  However,  further  investigation  is  needed  to  elucidate  the  physical  principles  that  govern  this  behavior  and  to  begin  the  process  of  designing  and  optimizing  VCMs  for  varying  plasma  settings.  Advancing  the  understanding  of  the  plasma-material  interactions  (PMI)  relevant  to  VCMs  necessitates  a  comprehensive  analysis  of  interconnected,  spatially  and  temporally  evolving  mechanisms,  including  plasma-infusion,  sputterant  transport,  and  charged  species  behavior. High  energy  density  applications  such  as  fusion  and  advanced  space  propulsion  technologies  exhibit  high  plasma  densities  near  the  wall  that  lead  to  life  and  performance  challenges.  For  VCM  surfaces,  these  conditions  lead  to  fully  infused  plasma  conditions  that  can  be  exploited  to  improve  material  life  and  system  performance.  This  research  uses  a  combined  experimental,  computational,  and  theoretical  approach  to  understand  the  underlying  plasma-infusion  physics  and  plasma  material  interactions  for  material  design  and  optimization.A  reduced-order  simulation  framework  of  sputtering  based  upon  binary-collision  approximation  (BCA)  data  uniquely  predicts  sputter  yields  and  analyzes  material  transport  within  plasma-facing  VCMs  [3].  This  approach,  grounded  in  the  validated  BCA  code  TRI3DYN,  addresses  key  limitations  in  existing  models  by  accurately  capturing  ion-solid  interaction  physics  not  accounted  for  in  existing  analytical  methods.This  simulation  framework  is  then  extended  to  analyze  sputtering  mitigation  in  EP  vacuum  chambers,  demonstrating  how  volumetrically  complex  materials  reduce  sputterant  deposition  and  optimize  chamber  design  for  reliable  in-space  propulsion  [4].Advanced  methods  such  as  additive  manufacturing  are  an  attractive  approach  to  creating  optimal  VCMs,  however,  additional  considerations  must  be  taken  into  account  in  the  design  phase  in  order  to  accommodate  this  process.  Steel  cage  VCMs  were  created  via  laser  powder  bed  fusion  additive  manufacturing,  and  underwent  sputtering  erosion  [5].  Artifacts  such  as  track-width  overrun,  spalling,  and  voids  were  noted. While  Li  and  Wirz  [1]  demonstrated  reduced  sputter  yield  in  VCMs,  the  transport  of  sputtered  material  within  them  remains  largely  unexplored;  this  is  especially  true  for  VCMs  in  non-plasma-facing  infusion  regimes.  Recent  sputtering  experiments  on  stochastic  aluminum  foam  VCMs,  analyzed  through  X-ray  tomography  and  SEM  [6],  provide  insight  into  sputter  deposition  in  forward  and  back-scattered  directions,  as  well  as  the  degradation  of  VCM  structures  and  surface  features  in  transitional,  and  plasma-infused  regimes.Using  the  results  from  the  abovementioned  investigations,  a  canonical  plasma-infusion  experiment  was  developed  to  directly  interrogate  the  subsurface  plasma  material  interactions.  Ultimately,  the  resulting  analysis  of  the  intra-VCM  plasma  transport  led  to  the  discovery  that  the  negative  density  gradient  into  the  material  resulted  in  the  full  range  of  plasma-infusion  conditions  from  fully-infused  to  transitional  to  plasma-facing.
■590    ▼aSchool  code:  0031.
■650  4▼aAerospace  engineering
■650  4▼aPlasma  physics
■650  4▼aMaterials  science
■650  4▼aComputational  physics
■653    ▼aFusion  energy
■653    ▼aInfusion
■653    ▼aSpace  propulsion
■653    ▼aSputtering
■653    ▼aPlasma  environments
■690    ▼a0538
■690    ▼a0759
■690    ▼a0794
■690    ▼a0216
■71020▼aUniversity  of  California,  Los  Angeles▼bAerospace  Engineering  0279.
■7730  ▼tDissertations  Abstracts  International▼g86-06B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165123▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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