Mechanical properties and plasma erosion resistance of BNp/Al2O3-SiO2 composite ceramics

Duan, Xiaoming; Jia, Dechang; Zhou, Yu; Yang, Zhihua; Wang, Yujin; Ren, Feng-qin; Yu, Daren; Ding, Yongjie

doi:10.1007/s11771-013-1635-3

Cited by 10 publications

(1 citation statement)

References 18 publications

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“…Thruster erosion may also be reduced by substituting the BN or BN-SiO 2 in the SPT walls with a material of lower sputtering yield. Efforts have attempted to use diamond [116], BN-SiO 2 reinforced with SiA1ON [117], and BN reinforced with Al 2 O 3 -SiO 2 [118]. There is also interest in replacing the Hall thruster wall material with nanomaterials that could be engineered to have low sputter yield, self-healing properties, or even the capability to influence the thruster discharge in a way that shields the walls from ion impact [119].…”

Section: Discussionmentioning

confidence: 99%

Review of Plasma-Induced Hall Thruster Erosion

Brown

Walker

2020

Applied Sciences

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The Hall thruster is a high-efficiency spacecraft propulsion device that utilizes plasma to generate thrust. The most common variant of the Hall thruster is the stationary plasma thruster (SPT). Erosion of the SPT discharge chamber wall by plasma sputtering degrades thruster performance and ultimately ends thruster life. Many efforts over the past few decades have endeavored to understand wall erosion so that novel thrusters can be designed to operate for the thousands of hours required by many missions. However, due to the challenges presented by the plasma and material physics associated with erosion, a complete understanding has thus far eluded researchers. Sputtering rates are not well quantified, erosion features remain unexplained, and computational models are not yet predictive. This article reviews the physics of plasma-induced SPT erosion, highlights important experimental findings, provides an overview of modeling efforts, and discusses erosion mitigation strategies.

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Section: Discussionmentioning

confidence: 99%

Review of Plasma-Induced Hall Thruster Erosion

Brown

Walker

2020

Applied Sciences

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Microstructure and erosion resistance of in-situ SiAlON reinforced BN-SiO2 composite ceramics

Tian

Duan

Yang

et al. 2016

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Chen

Zhang

et al. 2018

J Adv Ceram

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A series of h-BN based composites with Yb 4 Si 2 O 7 N 2 as a secondary phase were successfully synthesized by an in situ reaction hot pressing method. It was found that the relative density and room-temperature mechanical properties monotonically increased with increasing the content of Yb 4 Si 2 O 7 N 2 from 20 to 50 vol%. When 50 vol% Yb 4 Si 2 O 7 N 2 was introduced, the relative density of the composite reached 98.75%, and its flexural strength, compressive strength, fracture toughness, and hardness reached 338±10 MPa, 803±49 MPa, 2.06±0.06 MPa•m 1/2 , and 2.69±0.10 GPa, respectively. The strengthening effect of Yb 4 Si 2 O 7 N 2 was mainly attributed to its high modulus and high hardness. Fine microstructure was also advantageous to strength and could lead to more tortuous crack propagation paths and then improve the fracture toughness of the composites simultaneously. Meanwhile, the composites maintained good machinability.

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Mechanical properties and plasma erosion resistance of BNp/Al2O3-SiO2 composite ceramics

Cited by 10 publications

References 18 publications

Review of Plasma-Induced Hall Thruster Erosion

Review of Plasma-Induced Hall Thruster Erosion

Microstructure and erosion resistance of in-situ SiAlON reinforced BN-SiO2 composite ceramics

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

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