Optimal process parameters for 3Y-TZP/TiN conductive polycrystal by Taguchi method

Cui Feng Wang, Shi Yung Chiou, Keng Liang Ou, Zhang Ting Cai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

For the manufacturing of 3mol% Yttria-tetragonal Zirconia polycrystal (3Y-TZP) with 30wt% of Titanium Nitride (TiN) (3Y-TZP/TiN) powders, Taguchi method was used to selected the process parameters including sintering step variation, crushing time of TiN powder, the first step sintering duration and second step sintering temperature to be the controlling factors. The characterization features of sintered samples such as fracture toughness, flexural strength, hardness, relative density and electric resistance were explored through L 9 orthogonal array. By analysis of variance (ANOVA), the optimal parameter settings for each response factor were obtained and tested through confirmation experiments. The results indicate that the optimal process parameters contain 8 h crushing time of TiN powder, two - steps sintering processes including the 1450°C temperature with no duration for the first step and 1150°C temperature and 20 h duration for the second step, and the average flexural strength of 736.75 MPa and fracture toughness of 7.545 MPa(m 1/2 are obtained. In addition, the degree of the process parameter effects on the sintered samples is found in the series of the sintering duration of the first step, sintering step variation, size of TiN particles and the sintering temperature of the second step. Meanwhile, fracture toughness depends significantly on the ratio of tetragonal phase to monoclinic phase and attends to be 9.275 MPa·m 1/2 when the ratio is getting to the maximum. The average electric resistance for 3Y-TZP/ TiN is measured to be 3.26 mΩ·cm. These samples can be electric-discharge machined.

Original languageEnglish
Pages (from-to)529-535
Number of pages7
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Volume27
Issue number5
DOIs
Publication statusPublished - May 2012

Fingerprint

Taguchi methods
Titanium nitride
Yttrium oxide
Polycrystals
Zirconia
Sintering
Powders
Fracture toughness
Crushing
Bending strength
Electric discharges
Temperature
Analysis of variance (ANOVA)
yttria
zirconium oxide
titanium nitride
Hardness

Keywords

  • 3mol% Yttria-tetragonal zirconia (3Y-TZP)
  • Analysis of variance(ANOVA)
  • Flexural strength
  • Fracture toughness
  • Taguchi method

ASJC Scopus subject areas

  • Materials Science(all)
  • Inorganic Chemistry

Cite this

Optimal process parameters for 3Y-TZP/TiN conductive polycrystal by Taguchi method. / Wang, Cui Feng; Chiou, Shi Yung; Ou, Keng Liang; Cai, Zhang Ting.

In: Wuji Cailiao Xuebao/Journal of Inorganic Materials, Vol. 27, No. 5, 05.2012, p. 529-535.

Research output: Contribution to journalArticle

Wang, Cui Feng ; Chiou, Shi Yung ; Ou, Keng Liang ; Cai, Zhang Ting. / Optimal process parameters for 3Y-TZP/TiN conductive polycrystal by Taguchi method. In: Wuji Cailiao Xuebao/Journal of Inorganic Materials. 2012 ; Vol. 27, No. 5. pp. 529-535.
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abstract = "For the manufacturing of 3mol{\%} Yttria-tetragonal Zirconia polycrystal (3Y-TZP) with 30wt{\%} of Titanium Nitride (TiN) (3Y-TZP/TiN) powders, Taguchi method was used to selected the process parameters including sintering step variation, crushing time of TiN powder, the first step sintering duration and second step sintering temperature to be the controlling factors. The characterization features of sintered samples such as fracture toughness, flexural strength, hardness, relative density and electric resistance were explored through L 9 orthogonal array. By analysis of variance (ANOVA), the optimal parameter settings for each response factor were obtained and tested through confirmation experiments. The results indicate that the optimal process parameters contain 8 h crushing time of TiN powder, two - steps sintering processes including the 1450°C temperature with no duration for the first step and 1150°C temperature and 20 h duration for the second step, and the average flexural strength of 736.75 MPa and fracture toughness of 7.545 MPa(m 1/2 are obtained. In addition, the degree of the process parameter effects on the sintered samples is found in the series of the sintering duration of the first step, sintering step variation, size of TiN particles and the sintering temperature of the second step. Meanwhile, fracture toughness depends significantly on the ratio of tetragonal phase to monoclinic phase and attends to be 9.275 MPa·m 1/2 when the ratio is getting to the maximum. The average electric resistance for 3Y-TZP/ TiN is measured to be 3.26 mΩ·cm. These samples can be electric-discharge machined.",
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KW - Fracture toughness

KW - Taguchi method

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