On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets

Reaction-bonded silicon carbide (RB-SiC) ceramic is a promising material for space telescopes due to its high strength, lightweight, and low thermal expansion rate. However, its high hardness and brittleness bring difficulties to efficient processing with high quality. In this study, a novel fixed-a...

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Main Authors: Yang Yu, Xuanping Wang, Xiaoguang Guo, Hang Gao
Format: Article
Language:English
Published: Elsevier 2025-01-01
Series:Journal of Materials Research and Technology
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2238785424029879
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author Yang Yu
Xuanping Wang
Xiaoguang Guo
Hang Gao
author_facet Yang Yu
Xuanping Wang
Xiaoguang Guo
Hang Gao
author_sort Yang Yu
collection DOAJ
description Reaction-bonded silicon carbide (RB-SiC) ceramic is a promising material for space telescopes due to its high strength, lightweight, and low thermal expansion rate. However, its high hardness and brittleness bring difficulties to efficient processing with high quality. In this study, a novel fixed-abrasive spray suspension lapping (FSSL) process is proposed to achieve high-quality and efficient lapping of large-aperture RB-SiC mirrors, which can be integrated with computer controlled optical surfacing (CCOS) technology. With the effects of load force, spray pressure, and grit size on material removal characteristics and surface quality investigated, the results show that the material removal profile avoids center concentration and becomes uniform by virtue of spray suspensions, leading to improvement of surface quality. With observation of surface microstructure, the ductile-regime removal mechanism will result in a high-quality surface, and the minimum roughness Sa 13.5 nm is obtained. Finally, based on the rough surface contact theory, the material removal mechanism is discussed by comparing the average penetration depth of the abrasive and the critical depth of ductile-brittle transition.
format Article
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institution Kabale University
issn 2238-7854
language English
publishDate 2025-01-01
publisher Elsevier
record_format Article
series Journal of Materials Research and Technology
spelling doaj-art-747cbd56c7344ac0bd9610cca86eda5e2025-01-19T06:25:45ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013425702579On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-dropletsYang Yu0Xuanping Wang1Xiaoguang Guo2Hang Gao3State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China; School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, ChinaState Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China; School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, China; Corresponding author. State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China.State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China; School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, ChinaState Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China; School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, ChinaReaction-bonded silicon carbide (RB-SiC) ceramic is a promising material for space telescopes due to its high strength, lightweight, and low thermal expansion rate. However, its high hardness and brittleness bring difficulties to efficient processing with high quality. In this study, a novel fixed-abrasive spray suspension lapping (FSSL) process is proposed to achieve high-quality and efficient lapping of large-aperture RB-SiC mirrors, which can be integrated with computer controlled optical surfacing (CCOS) technology. With the effects of load force, spray pressure, and grit size on material removal characteristics and surface quality investigated, the results show that the material removal profile avoids center concentration and becomes uniform by virtue of spray suspensions, leading to improvement of surface quality. With observation of surface microstructure, the ductile-regime removal mechanism will result in a high-quality surface, and the minimum roughness Sa 13.5 nm is obtained. Finally, based on the rough surface contact theory, the material removal mechanism is discussed by comparing the average penetration depth of the abrasive and the critical depth of ductile-brittle transition.http://www.sciencedirect.com/science/article/pii/S2238785424029879RB-SiCRemoval uniformityCCOSMaterial removal mechanism
spellingShingle Yang Yu
Xuanping Wang
Xiaoguang Guo
Hang Gao
On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
Journal of Materials Research and Technology
RB-SiC
Removal uniformity
CCOS
Material removal mechanism
title On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
title_full On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
title_fullStr On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
title_full_unstemmed On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
title_short On a novel lapping method for RB-SiC ceramic materials by integration of fixed-abrasive with even-sprayed micro-droplets
title_sort on a novel lapping method for rb sic ceramic materials by integration of fixed abrasive with even sprayed micro droplets
topic RB-SiC
Removal uniformity
CCOS
Material removal mechanism
url http://www.sciencedirect.com/science/article/pii/S2238785424029879
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