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

Tian, Zhiling; Duan, Xiaoming; Yang, Zhihua; Ye, Shuqun; Jia, Dechang; Zhou, Yu

doi:10.1007/s11595-016-1369-9

Cited by 8 publications

(1 citation statement)

References 14 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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