The influence of the composition on (the load-dependence of) the microhardness of Y–Si–Al–O–N glasses as measured by Vickers indentation

Graaf, Dennis M. de; Braciszewicz, M.; Hintzen, H. T.; Sopicka-Lizer, Małgorzata; With, G. de

doi:10.1023/b:jmsc.0000017777.05637.a6

Cited by 21 publications

(14 citation statements)

References 17 publications

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“…In addition, measurements of elastic modulus and microhardness are specimen preparation dependent, and for the latter, load dependent if the load is less than about 20 Newton. 41) However, as stated above, each eq.% N substitution will introduce the same number of network crosslinks and hence, should have exactly the same effect in many glasses of different cation composition. Because of this, the reasonable similarities in gradient, given variations in preparation methods are quite explicable.…”

Section: Structural Implications Of Nitrogen Contentproperty Relationmentioning

confidence: 94%

SiAlON glasses: Effects of nitrogen on structure and properties

Pomeroy

Hampshire

2008

J. Ceram. Soc. Japan

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Sialon glasses are effectively alumino-silicates containing modifying cations (Mg, Ca, Y and Lanthanides) in which nitrogen substitutes for oxygen in the glass network. They are found at triple point junctions and as intergranular films in silicon nitride based ceramics. This paper provides an overview of M-Si-Al-O-N glasses and outlines the effects of composition on structure and properties. As nitrogen substitutes for oxygen, increases are observed in glass transition (Tg) and dilatometric softening (Tds) temperatures, viscosities, elastic moduli and microhardness and decreases can be seen in coefficient of thermal expansion as a result of extra crosslinking of the glass network. The gradients of the linear relationships between properties and nitrogen content are similar for a wide range of different sialon glass compositions and modifier types since each eq.% nitrogen substitution introduces the same number of additional crosslinks into the glass network.

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Section: Structural Implications Of Nitrogen Contentproperty Relationmentioning

confidence: 94%

SiAlON glasses: Effects of nitrogen on structure and properties

Pomeroy

Hampshire

2008

J. Ceram. Soc. Japan

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“…Hardness shows a step decrease with an increasing critical load and thereafter reaches saturation. This behavior is called indentation size effect (ISE) [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Vickers and Knoop Indentation Microhardness Study of β-SiAlON Ceramic

Güder

Şahin

et al. 2011

Acta Phys. Pol. A

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In this paper, analysis and interpretation of mechanical property measurements of β-SiAlON ceramic were reported. Indentation microhardness of β-SiAlON ceramic was measured using the Knoop and Vickers indenters. The analysis of the Vickers indentation microhardness data reveals the reverse indentation size effect that is the apparent microhardness increases with increasing applied indentation test load. However, the Knoop indentation microhardness data exhibit indentation size effect that is the apparent microhardness increases with decreasing applied test load. The experimental Knoop microhardness data was analyzed using Meyer's law, elastic-plastic deformation model, proportional specimen resistance model, and Hays-Kendall's model. As a result, modified proportional specimen resistance model is found to be the most effective one for the load-independent (H LI ) microhardness determination of the SiAlON ceramic. It was seen that different models used to analyze the data obtained from the Vickers indentation do not give the same intrinsic hardness value. We also present the calculation of the Young modulus, E, of the β-SiAlON ceramic.

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“…For bulk materials often Vickers indentation is used to determine hardness [1][2][3][4][5] while nanoindentation is used for bulk materials as well as coatings and thin films [6,7]. The types of materials examined via hardness testing (microindentation and nanoindentation) include metal alloys [4,6], ceramics [5,9], bioceramics [10], and glassy specimens [11].…”

Section: Introductionmentioning

confidence: 99%