Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/13180
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Title

Continuous in situ functionally graded silicon nitride materials

AuthorsBelmonte, Manuel CSIC ORCID; González Julián, Jesús CSIC ORCID; Miranzo López, Pilar CSIC ORCID; Osendi, María Isabel CSIC ORCID
KeywordsFunctionally graded materials
Ceramics
Spark plasma sintering
Hardness
Toughness
Issue Date25-Mar-2009
PublisherElsevier
CitationActa Materialia 57(9): 2607-2612 (2009)
AbstractFunctionally graded materials can enhance the performance of components under demanding operating conditions, although the development of residual stresses across the gradient and scaling up the manufacturing process to mass production present some limitations. To overcome these problems, we present a one-step approach for processing continuous functionally graded silicon nitride (Si3N4) materials from a sole homogeneous powder composition, using spark plasma sintering as a densification technique. Through the control of the temperature profile within the compact, specimens with a continuous variation of α- and β-phase content, as well as grain size, were achieved. A continuous gradation of mechanical properties, in particular, hardness and toughness, were measured in these specimens. This approach offers unprecedented opportunities to design custom-made Si3N4 components by taking advantage of the particularities of field-assisted sintering methods.
Description6 pages, 5 figures, 1 table.-- Printed version published May 2009.
Publisher version (URL)http://dx.doi.org/10.1016/j.actamat.2009.01.043
URIhttp://hdl.handle.net/10261/13180
DOI10.1016/j.actamat.2009.01.043
ISSN1359-6454
Appears in Collections:(ICV) Artículos

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