Electron microscopy study of ZrB2–SiC–AlN composites: Hot-pressing vs. pressureless sintering

Changlei Xia; Seyed Ali Delbari; Zohre Ahmadi; Mehdi Shahedi Asl; Mahdi Ghassemi Kakroudi; Quyet Van Le; Abbas Sabahi Namini; Mohsen Mohammadi; Mohammadreza Shokouhimehr

doi:10.1016/j.ceramint.2020.08.054

Electron microscopy study of ZrB₂–SiC–AlN composites: Hot-pressing vs. pressureless sintering

Changlei Xia, Seyed Ali Delbari, Zohre Ahmadi, Mehdi Shahedi Asl^*, Mahdi Ghassemi Kakroudi, Quyet Van Le^*, Abbas Sabahi Namini^*, Mohsen Mohammadi, Mohammadreza Shokouhimehr^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The impact of AlN addition on the microstructure and sinterability of ZrB₂-SiC composites was studied. The pressureless sintering and hot-pressing techniques were used as manufacturing methods. The composites produced by hot-pressing method were sintered at 1900 °C, producing fully dense products with 1 and 5 wt% AlN. X-ray diffraction (XRD), and electron microscopy (FESEM and HRTEM) instruments were implemented to characterize the produced composites. The XRD analysis clarified the in-situ formation of graphitized carbon during the sintering. However, no Al-based compounds could be identified in the patterns. Moreover, liquid phase formation was confirmed as one of the sintering mechanisms for the all samples, creating clean interfaces in the composites produced by hot-pressing.

Original language	English
Pages (from-to)	29334-29338
Number of pages	5
Journal	Ceramics International
Volume	46
Issue number	18
DOIs	https://doi.org/10.1016/j.ceramint.2020.08.054
Publication status	Published - 15 Dec 2020
Externally published	Yes

Keywords

Ceramic composites
Electron microscopy
Hot-pressing
Pressureless sintering

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10.1016/j.ceramint.2020.08.054

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title = "Electron microscopy study of ZrB2–SiC–AlN composites: Hot-pressing vs. pressureless sintering",

abstract = "The impact of AlN addition on the microstructure and sinterability of ZrB2-SiC composites was studied. The pressureless sintering and hot-pressing techniques were used as manufacturing methods. The composites produced by hot-pressing method were sintered at 1900 °C, producing fully dense products with 1 and 5 wt% AlN. X-ray diffraction (XRD), and electron microscopy (FESEM and HRTEM) instruments were implemented to characterize the produced composites. The XRD analysis clarified the in-situ formation of graphitized carbon during the sintering. However, no Al-based compounds could be identified in the patterns. Moreover, liquid phase formation was confirmed as one of the sintering mechanisms for the all samples, creating clean interfaces in the composites produced by hot-pressing.",

keywords = "Ceramic composites, Electron microscopy, Hot-pressing, Pressureless sintering",

author = "Changlei Xia and Delbari, {Seyed Ali} and Zohre Ahmadi and {Shahedi Asl}, Mehdi and {Ghassemi Kakroudi}, Mahdi and Le, {Quyet Van} and {Sabahi Namini}, Abbas and Mohsen Mohammadi and Mohammadreza Shokouhimehr",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and Techna Group S.r.l.",

year = "2020",

month = dec,

day = "15",

doi = "10.1016/j.ceramint.2020.08.054",

language = "English",

volume = "46",

pages = "29334--29338",

journal = "Ceramics International",

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TY - JOUR

T1 - Electron microscopy study of ZrB2–SiC–AlN composites

T2 - Hot-pressing vs. pressureless sintering

AU - Xia, Changlei

AU - Delbari, Seyed Ali

AU - Ahmadi, Zohre

AU - Shahedi Asl, Mehdi

AU - Ghassemi Kakroudi, Mahdi

AU - Le, Quyet Van

AU - Sabahi Namini, Abbas

AU - Mohammadi, Mohsen

AU - Shokouhimehr, Mohammadreza

PY - 2020/12/15

Y1 - 2020/12/15

N2 - The impact of AlN addition on the microstructure and sinterability of ZrB2-SiC composites was studied. The pressureless sintering and hot-pressing techniques were used as manufacturing methods. The composites produced by hot-pressing method were sintered at 1900 °C, producing fully dense products with 1 and 5 wt% AlN. X-ray diffraction (XRD), and electron microscopy (FESEM and HRTEM) instruments were implemented to characterize the produced composites. The XRD analysis clarified the in-situ formation of graphitized carbon during the sintering. However, no Al-based compounds could be identified in the patterns. Moreover, liquid phase formation was confirmed as one of the sintering mechanisms for the all samples, creating clean interfaces in the composites produced by hot-pressing.

AB - The impact of AlN addition on the microstructure and sinterability of ZrB2-SiC composites was studied. The pressureless sintering and hot-pressing techniques were used as manufacturing methods. The composites produced by hot-pressing method were sintered at 1900 °C, producing fully dense products with 1 and 5 wt% AlN. X-ray diffraction (XRD), and electron microscopy (FESEM and HRTEM) instruments were implemented to characterize the produced composites. The XRD analysis clarified the in-situ formation of graphitized carbon during the sintering. However, no Al-based compounds could be identified in the patterns. Moreover, liquid phase formation was confirmed as one of the sintering mechanisms for the all samples, creating clean interfaces in the composites produced by hot-pressing.

KW - Ceramic composites

KW - Electron microscopy

KW - Hot-pressing

KW - Pressureless sintering

UR - http://www.scopus.com/inward/record.url?scp=85089538089&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2020.08.054

DO - 10.1016/j.ceramint.2020.08.054

M3 - Article

AN - SCOPUS:85089538089

SN - 0272-8842

VL - 46

SP - 29334

EP - 29338

JO - Ceramics International

JF - Ceramics International

IS - 18

ER -

Electron microscopy study of ZrB₂–SiC–AlN composites: Hot-pressing vs. pressureless sintering

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Keywords

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