A method to strengthen and toughen Sapphire by codoping of Fe/Ti ions

Hu Ke-Yan; Xu Jun; Tang Hui-Li; Li Hong-Jun; Zou Yu-Qi; Su Liang-Bi; Chen Wei-Chao; Yu Hai-Ou; Yang Qiu-Hong

doi:10.7498/aps.62.066201

Abstract

Mechanical properties of titanium and iron co-doped Sapphire crystal are first studied at room temperature Large (ø180 × 280 mm3 in dimension 30 kg in weight) titanium and iron codoped sapphire single crystal is grown by the Kyropoulos technique It is shown that the fracture strength and surface hardness and fracture toughness of as-grown crystals are significantly improved and the visible-infrared optical property is not adversely affected by titanium and iron codoping and certain heat treatment. The Fe3+ in the doped Fe2O3 palys a role of substituting Al3+, leading to an in creased internal stress in the crystal. And the Ti4+ in the doped TiO2 crystallizes the second phase needle crystal and brings in a toughening effect through certain heat treatment. As a consequence, the mechanical properties of as-grown sapphire are improved at room temperature. The present work has the realistic significance for developing the sapphires of excellent mechanical properties.

Keywords:

Authors and contacts

1.
Department of Electronic Information Materials, Shanghai University, Shanghai 201800, China;
2.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
Funds: Project supported by the Science and Technology Commission of Shanghai Municipality, China (Grant No. 10ZR1434200) and the National Natural Science Foundation of China (Grant No. 61177037).

References

[1]	Akselrod M S, Bruni F J 2012 J. Crystal Growth 360 134
[2]	Lee H C, Meissner H E 2007 Proc. SPIE 6545 65450K
[3]	Xu S R, Hao Y, Zhang J C 2011 Chin. Phys. B 20 107802
[4]	Castillo Rodriguez M, Munoz A, Castaing J 2007 J. Eur. Ceram. Soc. 27 3317
[5]	Savrun E, Scott W D, Harris D C 2001 J. Mater. Sci. 36 2295
[6]	Song Y F, Yu G Y, Yin H D, Zhang M F, Liu Y Q, Yang Y Q 2012 Acta Phys. Sin. 61 064211 (in Chinese) [宋云飞, 于国洋, 殷合栋, 张明福, 刘玉强, 杨延强 2012 物理学报 61 064211]
[7]	Wang Y, Qi M, Li G Q 2008 Mater. Lett. 62 1444
[8]	Dezsi I, Szucs I, Fetzer C 2008 J. Appl. Phys. 104 034904
[9]	Kirkpatrick A, Harris D C, Johnson L F 2001 J. Mater. Sci. 36 2195
[10]	Nehari A, Brenier A, Panzer G 2011 Crystal Growth and Design 11 445
[11]	Moon A R, Phillips M R 1994 J. Am. Ceram. Soc. 77 356
[12]	Guan Z D, Zhang Z T, Jiao J S 1992 Physical Properties of Inorganic Materials (1st Ed.) (Beijing: Tsinghua University Press) p22, 42 (in Chinese) [关振铎, 张中太, 焦金生 1992 无机材料物理性能 (第1版) (北京: 清华大学出版社) 第22, 42页]

Cited By

[1]	Akselrod M S, Bruni F J 2012 J. Crystal Growth 360 134
[2]	Lee H C, Meissner H E 2007 Proc. SPIE 6545 65450K
[3]	Xu S R, Hao Y, Zhang J C 2011 Chin. Phys. B 20 107802
[4]	Castillo Rodriguez M, Munoz A, Castaing J 2007 J. Eur. Ceram. Soc. 27 3317
[5]	Savrun E, Scott W D, Harris D C 2001 J. Mater. Sci. 36 2295
[6]	Song Y F, Yu G Y, Yin H D, Zhang M F, Liu Y Q, Yang Y Q 2012 Acta Phys. Sin. 61 064211 (in Chinese) [宋云飞, 于国洋, 殷合栋, 张明福, 刘玉强, 杨延强 2012 物理学报 61 064211]
[7]	Wang Y, Qi M, Li G Q 2008 Mater. Lett. 62 1444
[8]	Dezsi I, Szucs I, Fetzer C 2008 J. Appl. Phys. 104 034904
[9]	Kirkpatrick A, Harris D C, Johnson L F 2001 J. Mater. Sci. 36 2195
[10]	Nehari A, Brenier A, Panzer G 2011 Crystal Growth and Design 11 445
[11]	Moon A R, Phillips M R 1994 J. Am. Ceram. Soc. 77 356
[12]	Guan Z D, Zhang Z T, Jiao J S 1992 Physical Properties of Inorganic Materials (1st Ed.) (Beijing: Tsinghua University Press) p22, 42 (in Chinese) [关振铎, 张中太, 焦金生 1992 无机材料物理性能 (第1版) (北京: 清华大学出版社) 第22, 42页]

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