| Indentation Load Effect on Young＇s Modulus and Hardness of Porous Sialon Ceramic by Depth Sensing Indentation Tests |
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| 引用本文： | Osman SAHIN. Indentation Load Effect on Young＇s Modulus and Hardness of Porous Sialon Ceramic by Depth Sensing Indentation Tests[J]. 中国物理快报, 2007, 24(11): 3206-3209 |
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| 作者姓名： | Osman SAHIN |
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| 作者单位： | Department of Physics, Art and Science Faculty, Silleyman Demirel University, Isparta, Turkey |
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| 基金项目： | Supported by the Turkish State Planning Organization （DPT） under Grant No 2003K120510. The author is grateful to Professor Malgorzata Sopicka-Lizer from Silesian University of Technology, Katowice, POLAND, for supplying the sample. |
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| 摘 要： | Depth sensing indentation （DSI） tests at the range of 200-1800mN are performed on porous sialon ceramic to determine the indentation load on Young＇s modulus and hardness values. The Young modulus and hardness （Dynamic and Martens） values are deduced by analysing the unloading segments of the DSI test load-displacement curves using the Oliver-Pharr method. It is found that Young＇s modulus ET, the dynamic hardness HD and the Martens hardness HM exhibit significant indentation load dependences. The values of Young＇s modulus and hardness decrease with the increasing indentation load, as a result of indentation load effect. The experimental hf /hm ratios lower than the critical value 0.7, with hm being the maximum penetration depth during loading and hf the final unloading depth, indicate that our sample shows the work hardening behaviour.
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| 关 键 词： | 印压 硅铝氧氮陶瓷 负载效应 模量 |
| 收稿时间： | 2007-04-25 |
Indentation Load Effect on Young''s Modulus and Hardness of Porous Sialon Ceramic by Depth Sensing Indentation Tests |
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| Osman SAHIN. Indentation Load Effect on Young''s Modulus and Hardness of Porous Sialon Ceramic by Depth Sensing Indentation Tests[J]. Chinese Physics Letters, 2007, 24(11): 3206-3209 |
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| Authors: | Osman SAHIN |
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| Affiliation: | Department of Physics, Art and Science Faculty, Süleyman Demirel University, Isparta, Turkey |
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| Abstract: | Depth sensing indentation (DSI) tests at the range of 200--1800mN areperformed on porous sialon ceramic to determine the indentation load onYoung's modulus and hardness values. The Young modulus and hardness(Dynamic and Martens) values are deduced by analysing the unloadingsegments of the DSI test load-displacement curves using the Oliver--Pharr method. It is found that Young's modulus Er, the dynamic hardness HD and the Martens hardness HM exhibit significant indentation load dependences. The values of Young's modulus and hardness decrease with the increasing indentation load, as a result of indentation load effect. The experimental hf/hm ratios lower than the critical value 0.7, with hm being the maximum penetration depth during loading and hf the final unloading depth, indicate that our sample shows the work hardening behaviour. |
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| Keywords: | 62.20.-x 62.20.Dc 62.20.Qp |
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