Cargando…

A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing

Structural ceramics are potential mold materials for hot embossing, due to their superior mechanical strength as well as low thermal expansion coefficient. However, the service time of molds, especially those in high-temperature hot embossing, strongly depends on their oxidation resistance. As a res...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhu, Youcheng, Gong, Feng, Yang, Gao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692995/
https://www.ncbi.nlm.nih.gov/pubmed/36431530
http://dx.doi.org/10.3390/ma15228045
_version_ 1784837418103341056
author Zhu, Youcheng
Gong, Feng
Yang, Gao
author_facet Zhu, Youcheng
Gong, Feng
Yang, Gao
author_sort Zhu, Youcheng
collection PubMed
description Structural ceramics are potential mold materials for hot embossing, due to their superior mechanical strength as well as low thermal expansion coefficient. However, the service time of molds, especially those in high-temperature hot embossing, strongly depends on their oxidation resistance. As a result, the oxidation behaviors of various ceramics (e.g., SiC, ZrO(2), AlN, Al(2)O(3), Si(3)N(4) and WC) were investigated by conducting cyclic oxidation experiments in this study. Mass changes of ceramic samples thermal treated under different temperatures were measured by thermogravimeter (TGA) and precision electronic balance. The structural and chemical compositions of ceramic samples were detected by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDXS). The surface morphology of the samples was characterized by scanning electron microscopy (SEM), and the surface roughness of the samples was measured by white light interferometry. The mechanical properties of the samples were evaluated by a microhardness tester and nanoindentation instrument. It is noted that Al(2)O(3) shows negligible oxidation within 1000 °C. ZrO(2) maintains a decent surface roughness of below 32 nm and a stable hardness within 1000 °C. SiC has the highest hardness at high temperatures, and its surface roughness increases notably above 800 °C. The surface roughness of Si(3)N(4) and AlN soars between 600 °C and 800 °C. The surface finish of WC is significantly deteriorated above 600 °C. Therefore, the appropriate embossing temperature of Al(2)O(3) ceramics is below 1000 °C, that of ZrO(2) ceramics is between 800 °C and 1000 °C, that of SiC ceramics is below 800 °C, that of Si(3)N(4) and AlN ceramics is between 600 °C and 800 °C, and that of WC ceramics below 600 °C.
format Online
Article
Text
id pubmed-9692995
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-96929952022-11-26 A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing Zhu, Youcheng Gong, Feng Yang, Gao Materials (Basel) Article Structural ceramics are potential mold materials for hot embossing, due to their superior mechanical strength as well as low thermal expansion coefficient. However, the service time of molds, especially those in high-temperature hot embossing, strongly depends on their oxidation resistance. As a result, the oxidation behaviors of various ceramics (e.g., SiC, ZrO(2), AlN, Al(2)O(3), Si(3)N(4) and WC) were investigated by conducting cyclic oxidation experiments in this study. Mass changes of ceramic samples thermal treated under different temperatures were measured by thermogravimeter (TGA) and precision electronic balance. The structural and chemical compositions of ceramic samples were detected by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDXS). The surface morphology of the samples was characterized by scanning electron microscopy (SEM), and the surface roughness of the samples was measured by white light interferometry. The mechanical properties of the samples were evaluated by a microhardness tester and nanoindentation instrument. It is noted that Al(2)O(3) shows negligible oxidation within 1000 °C. ZrO(2) maintains a decent surface roughness of below 32 nm and a stable hardness within 1000 °C. SiC has the highest hardness at high temperatures, and its surface roughness increases notably above 800 °C. The surface roughness of Si(3)N(4) and AlN soars between 600 °C and 800 °C. The surface finish of WC is significantly deteriorated above 600 °C. Therefore, the appropriate embossing temperature of Al(2)O(3) ceramics is below 1000 °C, that of ZrO(2) ceramics is between 800 °C and 1000 °C, that of SiC ceramics is below 800 °C, that of Si(3)N(4) and AlN ceramics is between 600 °C and 800 °C, and that of WC ceramics below 600 °C. MDPI 2022-11-14 /pmc/articles/PMC9692995/ /pubmed/36431530 http://dx.doi.org/10.3390/ma15228045 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhu, Youcheng
Gong, Feng
Yang, Gao
A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title_full A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title_fullStr A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title_full_unstemmed A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title_short A Comprehensive Study on High-Temperature Oxidation Behavior of Ceramic Molds for Hot Embossing
title_sort comprehensive study on high-temperature oxidation behavior of ceramic molds for hot embossing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692995/
https://www.ncbi.nlm.nih.gov/pubmed/36431530
http://dx.doi.org/10.3390/ma15228045
work_keys_str_mv AT zhuyoucheng acomprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing
AT gongfeng acomprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing
AT yanggao acomprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing
AT zhuyoucheng comprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing
AT gongfeng comprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing
AT yanggao comprehensivestudyonhightemperatureoxidationbehaviorofceramicmoldsforhotembossing