Effect of aluminum and tin on the sintering of porous titanium

Khromov, V. G.

doi:10.1007/bf00791884

Cited by 4 publications

(6 citation statements)

References 2 publications

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“…It may be fortuitous that the results for the AEE <20-lm powder (full PSD) lie close to the line given by Eq. [9], given that the results for the CERAC and Sumitomo -100 full PSD powders lie above the line. Curvature of the densification curve toward the origin is evident from the result for the CERAC -100 powder (full PSD) sintered at 800°C for 2 hours, for which only slight densification occurred.…”

Section: B Comparison Of Model With Experimental Datamentioning

confidence: 89%

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Some Effects of Particle Size on the Sintering of Titanium and a Master Sintering Curve Model

Robertson

Schaffer

2009

Metall Mater Trans A

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The press-and-sinter method of producing net shapes was applied to titanium alloys. The quantitative effects of the particle size of titanium and Ti-6Al-4V powders on the green and sintered densities were examined. Most powders were pressed at 100 to 800 MPa and sintered under vacuum at 1100°C, 1200°C, or 1300°C for 2 hours. The green density was higher for coarser powders and for powders with a wider size distribution. The sintered density was higher for finer powders and for powders with a wider size distribution. The densification parameter was little affected by the compaction pressure but increased as the particle size was reduced. An empirical model of densification based on the master sintering curve approach was developed, with the activation energy for densification of titanium found to be approximately 160 kJ/mol.

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Section: B Comparison Of Model With Experimental Datamentioning

confidence: 89%

“…Coarse powders are usually lightly compacted and sintered to produce filters [9,10] and medical implants with a low Young's modulus. [11][12][13] Finer particles are compacted at high pressure and sintered to achieve low porosity and high strength, toughness, and fatigue life.…”

Section: Introductionmentioning

confidence: 99%

Some Effects of Particle Size on the Sintering of Titanium and a Master Sintering Curve Model

Robertson

Schaffer

2009

Metall Mater Trans A

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“…79 Numerous studies have been made of Ti-Al diffusion couples, 80 synthesis of Ti-Al IMCs [81][82][83][84][85][86] and sintering of Ti-Al alloys. 10,21,25,36,40,43,[87][88][89][90][91] 5 Sintered densities of Ti-6Al-4V from same sources as in Fig. 4 (sintered at 1250-1350uC except 1200uC for CP Ti curve).…”

Section: Titanium-aluminium Alloysmentioning

confidence: 99%

“…20,45,[101][102][103][104] 10 Effect of sintering temperature on density for Ti-6Al-4V (and 13 mm Ti6Al6V), with green density plotted at 600uC. 40,50,62,77 Towards one end of the usual size spectrum are coarse particles, often spherical atomised particles, lightly compacted and sintered to produce filters 87,105 and medical implants with low Young's modulus. 28,40,106 Towards the other end are fine particles compacted at high pressure and sintered to achieve low porosity and high strength, toughness and fatigue life.…”

Section: Particle Sizementioning

confidence: 99%

“…Dilatometry curves often reveal small amounts of swelling early in the sintering heat treatment caused by melting of Al or Sn, formation of other liquids, unbalanced solid state diffusion or formation of IMC. 25,56,79,81,82,87,[101][102][103]111,118,120,122,123,[130][131][132][133][134][135][136] Extensive swelling can also occur late in the sintering heat treatment due to high gas pressure within closed pores (i.e. above y90% density).…”

Section: Other Alloysmentioning

confidence: 99%

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Review of densification of titanium based powder systems in press and sinter processing

Robertson

Schaffer

2010

Powder Metallurgy

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The development of novel extractive metallurgy techniques for titanium offers the prospect of lower cost Ti powder and therefore wider application of Ti. This review is largely confined to coverage of the low cost press and sinter methods of powder metallurgy, consisting of cold pressing of mixed elemental powders followed by sintering without the application of external pressure. Cold die compaction, sintering behaviour and densification are reviewed in detail. Some information on powders and cold isostatic pressing is included. Microstructure, mechanical properties and applications are considered in less detail. The review deals mostly with the sintering of alloys, but there is some reference to synthesis of intermetallic compounds, such as the shape memory alloy NiTi and titanium aluminides for high temperature applications. Densification is discussed in terms of the four fundamental processing variables: compaction pressure, particle size, sintering temperature and sintering time. Other factors such as alloy composition, the form of alloying addition, type and impurity content of powders and heating rate are also considered.

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Porous Materials from Titanium Powders: Past, Present, and Future

Савич

2014

Powder Metall Met Ceram

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Effect of aluminum and tin on the sintering of porous titanium

Cited by 4 publications

References 2 publications

Some Effects of Particle Size on the Sintering of Titanium and a Master Sintering Curve Model

Some Effects of Particle Size on the Sintering of Titanium and a Master Sintering Curve Model

Review of densification of titanium based powder systems in press and sinter processing

Porous Materials from Titanium Powders: Past, Present, and Future

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