Study on Preparation of Gradient Porous Ti by Powder Metallurgy Method

Qiang Li; Jing Yuan Yu; Er Yong Zheng; Ze Sun; Yu Shan Zeng

doi:10.4028/www.scientific.net/AMR.490-495.3589

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 490-495Study on Preparation of Gradient Porous Ti by...

Study on Preparation of Gradient Porous Ti by Powder Metallurgy Method

Abstract:

Gradient porous Ti was prepared by powder metallurgy method using NH4HCO3 as pore former. The effect of content and distribution of NH4HCO3 and sintering temperature on pore characteristic, sintering shrinkage, flexural property was studied. Stress-strain curves of gradient and uniform porous Ti material were compared. The results show the porosity, sintering shrinkage rate and flexural strength vary from 51.8% to 41.3%, from 23.5% to 28.7%, and from 145.7 MPa to 221.6 MPa when the distribution of NH4HCO3 varying form uniformity to gradient. Additionally, with the increase of sintering temperature, the porosity of gradient samples first increases and then decreases. When sintered at 1573K for 2h, the porosity of gradient porous Ti has the maximum of 45.6%. Moreover, there is pseudo yield phenomenon according to the test curve of three points bending of the gradient porous Ti with three layers structure.

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Periodical:

Advanced Materials Research (Volumes 490-495)

Pages:

3589-3593

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.490-495.3589

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Online since:

March 2012

Authors:

Qiang Li, Jing Yuan Yu, Er Yong Zheng, Ze Sun, Yu Shan Zeng

Keywords:

Flexural Property, Gradient Porous Ti, Pore Characteristic, Powder metallurgy

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