![](/images/graphics-bg.png)
Sintering Behavior, Microstructure, and Mechanical Properties : A Comparison among Pressureless Sintered Ultra-Refractory Carbides
Joint Authors
Silvestroni, Laura
Sciti, Diletta
Source
Advances in Materials Science and Engineering
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-12-01
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Nearly fully dense carbides of zirconium, hafnium, and tantalum were obtained by pressureless sintering at 1950°C with the addition of 5–20 vol% of MoSi2.
Increasing the amount of sintering aid, the final density increased too, thanks to the formation of small amounts of liquid phase constituted by M-Mo-Si-O-C, where M is either Zr, Hf, or Ta.
The matrices of the composites obtained with the standard procedure showed faceted squared grains; when an ultrasonication step was introduced in the powder treatment, the grains were more rounded and no exaggerated grains growth occurred.
Other secondary phases observed in the microstructure were SiC and mixed silicides of the transition metals.
Among the three carbides prepared by pressurless sintering, TaC-based composites had the highest mechanical properties at room temperature (strength 590 MPa, Young's modulus 480 GPa, toughness 3.8 MPa⋅m1/2).
HfC-based materials showed the highest sinterability (in terms of final density versus amount of sintering aid) and the highest high-temperature strength (300 MPa at 1500 °C).
American Psychological Association (APA)
Silvestroni, Laura& Sciti, Diletta. 2010. Sintering Behavior, Microstructure, and Mechanical Properties : A Comparison among Pressureless Sintered Ultra-Refractory Carbides. Advances in Materials Science and Engineering،Vol. 2010, no. 2010, pp.1-11.
https://search.emarefa.net/detail/BIM-501889
Modern Language Association (MLA)
Silvestroni, Laura& Sciti, Diletta. Sintering Behavior, Microstructure, and Mechanical Properties : A Comparison among Pressureless Sintered Ultra-Refractory Carbides. Advances in Materials Science and Engineering No. 2010 (2010), pp.1-11.
https://search.emarefa.net/detail/BIM-501889
American Medical Association (AMA)
Silvestroni, Laura& Sciti, Diletta. Sintering Behavior, Microstructure, and Mechanical Properties : A Comparison among Pressureless Sintered Ultra-Refractory Carbides. Advances in Materials Science and Engineering. 2010. Vol. 2010, no. 2010, pp.1-11.
https://search.emarefa.net/detail/BIM-501889
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-501889