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CORRELATION OF HARDNESS AND SILICON MORPHOLOGY FOR Al-Si-Sb ALLOY

100%

Uzun O., Yilmaz F., Emeksiz C., Ergen S., Kolemen U.

Archives of Metallurgy and Materials

2018

vol. 63

issue 1

Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests

86%

Şahin O., Güder H., Uzun O., Şahin E., Sopicka-Lizer M., Göçmez H., Artunc E.

Acta Physica Polonica A

2015

vol. 128

issue 2B

B-355-B-359

Both pressureless-sintered and dense, fine-grained silicon nitride ceramics were produced from mechanochemically activated nitride-based precursors. Scanning Electron Microscopy (SEM), Transmition Electron Microscopy (TEM), X-Ray Diffraction (XRD) and an ultra-low load microhardness tester were used to characterize these ceramics. Depth-sensing indentation (DSI) tests in the range of 200-1800 mN were performed on the silicon nitride ceramic to determine dynamic hardness (H_d) and reduced elastic modulus (E_r) values. These values were deduced by analyzing the unloading segments of the DSI curves. It was found that both H_d and E_r exhibits a significant indentation load dependence. Nix-Gao (NG) model was used to analyze the dynamic hardness data in the calculation of the load independent hardness value.

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1 Acta Physica Polonica A

1 Archives of Metallurgy and Materials

1 2018

1 2015

2 Uzun O.

1 Artunc E.

1 Emeksiz C.

1 Ergen S.

1 Göçmez H.

1 Güder H.

1 Kolemen U.

1 Sopicka-Lizer M.

1 Yilmaz F.

1 Şahin E.

1 Şahin O.

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CORRELATION OF HARDNESS AND SILICON MORPHOLOGY FOR Al-Si-Sb ALLOY

Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests