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Enhancing High-Temperature Strength and Thermal Stability of Al2O3/Al Composites by High-Temperature Pre-treatment of Ultrafine Al Powders
Zan, Yu-Ning1,3; Zhou, Yang-Tao1; Li, Xiao-Nan1,3; Ma, Guo-Nan1,3; Liu, Zhen-Yu1; Wang, Quan-Zhao2; Wang, Dong1; Xiao, Bo-Lv1; Ma, Zong-Yi1
Corresponding AuthorWang, Quan-Zhao(qzhwang@imr.ac.cn) ; Ma, Zong-Yi(zyma@imr.ac.cn)
2020-04-15
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume33Issue:7Pages:9
AbstractAmorphous Al2O3-reinforced Al composite (am-Al2O3/Al) compacted from ultrafine Al powders for high-temperature usages confronts with drawbacks because crystallization of am-Al2O3 at high temperatures will result in serious strength loss. Aiming at this unsolved problem, in this study, high-temperature Al materials with enhanced thermal stability were developed through introducing more thermally stable nano-sized particles via high-temperature pre-treatment of ultrafine Al powders. It was found that the pre-treatment at <= 550 degrees C could introduce a few Al2O3 in the Al matrix and increase the strength of the composites, but the strength was still below that of am-Al2O3/Al because without being pinned firmly, grain boundaries (GBs) were softened at high temperature and intergranular fracture happened. When the pre-treatment was carried out at 600 degrees C, nitridation and oxidation processes happened simultaneously, producing large numbers of intergranular (AlN + gamma-Al2O3) particles. GB sliding and intergranular fracture were suppressed; therefore, higher strength than that of am-Al2O3/Al was realized. Furthermore, the (AlN + gamma-Al2O3)/Al exhibited more superior thermal stability compared to am-Al2O3/Al for annealing treatment at 580 degrees C for 8 h. Therefore, an effective way to fabricate high-temperature Al composite with enhanced thermal stability was developed in this study.
KeywordAluminum matrix composites Particles High-temperature strength Thermal stability
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; National Key R&D Program of China
DOI10.1007/s40195-020-01038-8
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[U1508216] ; National Natural Science Foundation of China[51771194] ; Youth Innovation Promotion Association CAS[2016179] ; National Key R&D Program of China[2017YFB0703104]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000526233900001
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138244
Collection中国科学院金属研究所
Corresponding AuthorWang, Quan-Zhao; Ma, Zong-Yi
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang, Peoples R China
Recommended Citation
GB/T 7714
Zan, Yu-Ning,Zhou, Yang-Tao,Li, Xiao-Nan,et al. Enhancing High-Temperature Strength and Thermal Stability of Al2O3/Al Composites by High-Temperature Pre-treatment of Ultrafine Al Powders[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(7):9.
APA Zan, Yu-Ning.,Zhou, Yang-Tao.,Li, Xiao-Nan.,Ma, Guo-Nan.,Liu, Zhen-Yu.,...&Ma, Zong-Yi.(2020).Enhancing High-Temperature Strength and Thermal Stability of Al2O3/Al Composites by High-Temperature Pre-treatment of Ultrafine Al Powders.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(7),9.
MLA Zan, Yu-Ning,et al."Enhancing High-Temperature Strength and Thermal Stability of Al2O3/Al Composites by High-Temperature Pre-treatment of Ultrafine Al Powders".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.7(2020):9.
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