Hardness and fracture toughness of alumina-based particulate composites with zirconia and strontia additives

ผู้แต่ง

  • Theeranee Oungkulsolmongkol Faculty of Science, Chulalongkorn University
  • Pantip Salee-art Faculty of Science, Chulalongkorn University
  • Wantanee Buggakupta Faculty of Science, Chulalongkorn University and esearch Unit of Advanced Ceramics and Polymeric Materials, National Center of Excellence for Petroleum, Petrochemical and Advanced Materials, Chulalongkorn University

บทคัดย่อ

This project aims to study characteristics and mechanical properties i.e. hardness and fracture toughness of alumina matrix composite materials containing zirconia and strontium oxide. Two groups of composite specimen were fabricated: (i) Al2O3 matrix with 3 mol% Y2O3- ZrO2, varied from 10, 20, 30 and 40 vol%, and (ii) Al2O3 matrix with 2, 5, 10 and 15 vol% SrO added in the form of SrCO3. The powders were blended and then pressed into pellets. The compacts were pressureless sintered at 1600 ºC for 2 hours in air. Density measurement of the sintered composites was carried out using liquid immersion. Hardness and fracture toughness were carried out using the Vickers indentation. Microstructure was observed using scanning electron microscopy and phase content was detected by mean of X- ray diffraction. The Al2O3 containing ZrO2 forms finer alumina grains along with phase transformation, leading to higher toughness. Meanwhile, the Al2O3 containing SrO forms elongated grains, enhancing toughness due to crack deflection. Then, the blend between Al2O3-ZrO2-SrO composites was assumed whether a combination of them both may improve the mechanical properties. It was found that an addition of SrO and ZrO2 in the same Al2O3 matrix could not provide better hardness, but could improve fracture toughness compared to the two component composites.

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เอกสารอ้างอิง

Tuan, W.H., Chen, R.Z., Wang, T.C., Cheng, C.H. & Kuo, P.S. (2002). Mechanical properties of Al2O3/ZrO2 composites. J. Eur. Ceram Soc. 22(16) : 2827-2833.

Sadangi, R.K., Shukla, V. & Kear, B.H. (2005). Processing and properties of ZrO2(3Y2O3) -Al2O3 nanocomposites. Int. J. Refract. Met. H. 23(4-6) : 363-368.

Domínguez, C., Chevalier, J., Torrecillas, R. & Fantozzi, G. (2001). Microstructure development in calcium hexaluminate. J. Eur. Ceram Soc. 21(3) : 381-387.

Sanchez-Herencia, A.J., Moreno, R. & Baudín, C. (2000). Fracture behaviour of aluminacalcium hexaluminate composites obtained by colloidal processing. J. Eur. Ceram Soc. 20(14-15) : 2575-2583.

Cutler, R.A., Mayhew, R.J., Prettyman, K.M. & Virkar, A.V. (1991). High-toughness CeTZP/Al2O3 ceramics with improved hardness and strength. J. Am. Ceram Soc. 74(1) : 179-186.

Chen, P.L. & Chen, I.W. (1992). In-situ alumina/ aluminate platelet composites. J. Am. Ceram. Soc. 75(9) : 2610-2612.

An, L., Chan, H.M. & Soni, K.K. (1996). Control of calcium hexaluminate grain morphology in in-situ toughened ceramic composites. J. Mater. Sci. 31(12) : 3223-3229.

Vishista, K. & Gnanam, F.D. (2009). Microstructure development of SrAl12O19 in aluminastrontia composites. J. Eur. Ceram. Soc. 29(1) : 77-83.

Vishista, K. & Gnanam, F.D. (2006). Effect of strontia on the densification and mechanical properties of sol-gel alumina. Ceram. Int. 32(8) : 917-922.

Maschio, S. & Pezzotti, G. (1999). Microstructure development and mechanical properties of alumina-hexaluminate composites as-sintered and after aging in aquous physiological solution. J. Ceram. Soc. Japan. 107(3) : 270-274.

Schmid, C., Lucchini, E., Sbaizero, O. & Maschio, S. (1999). The systhesis of calcium and strontium hexaluminate added ZTA composite ceramics. J. Eur. Ceram. Soc. 19(9) : 1741-1746.

ASTM Standard Designation C 1327-03. Standard test method for vickers indentation hardness of advanced ceramics. ASTM USA : International.

Sergejev, F. & Antonov, M. (2006). Comparative study on indentation fracture toughness measurement on cemented carbides. Proc. Estonian Acad. Sci. Eng. 12(4) : 388-398.

ดาวน์โหลด

เผยแพร่แล้ว

2017-04-15

วิธีการอ้างอิง

[1]
T. Oungkulsolmongkol, P. . Salee-art, และ W. Buggakupta, “Hardness and fracture toughness of alumina-based particulate composites with zirconia and strontia additives”, J Met Mater Miner, ปี 20, ฉบับที่ 2, เม.ย. 2017.

ฉบับ

ปีที่ 20 ฉบับที่ 2 (2010)

บท

Original Research Articles

การอนุญาต

ลิขสิทธิ์ (c) 2017 Journal of Metals, Materials and Minerals

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