Mechanism of the liquid-phase sintering for Nd:YAG ceramics

Boulesteix, Rémy; Maı̂tre, Alexandre; Baumard, Jean‐François; Sallé, Christian; Rabinovitch, Y.

doi:10.1016/j.optmat.2008.04.005

Cited by 101 publications

(67 citation statements)

References 21 publications

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“…It can suggest that the apparent activation for the present research is close to that of Sn in Cu, as well as, the liquidphase sintering of Sn additives is a dominant densification mechanism for the hot pressing of the metallic powder mixture, which is also consistent with the fact that the activation energy decreases with increasing the amount of adding liquid-phase element. 10,11) Although the concept of MSC originally developed 1) for the densification of solid state sintering, it was found to be applicable to liquid phase sintering of the present research, which agreed well with the literature. 5,6) It might be due to the fact that the MSC concept is based on the single value of activation energy to make all the data placed on a single curve regardless of heating path.…”

Section: Resultssupporting

confidence: 88%

The Pressure-Assisted Master Sintering Surface of Metallic Powder Mixture

Han

Kim

2010

Mater. Trans.

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The use of master sintering curve (MSC) is an effective method to predict densification during sintering or hot pressing. Empirical models of MSC in early studies were developed using a single kind of powder or a major powder with a little amount of sintering additives. For the present study, the powder mixture consisting of 6 different metallic materials was used to see whether the concept of MSC can be applicable to the hot pressing of metallic powder mixture. Three data sets having different heating rates merged onto a single curve when the density was plotted as a logarithmic function of Â as well as the best estimation of the activation energy was found, where Â is the integral of temperature function over time. It was found that the density versus Â profile can be used to predict the final density of metallic powder mixture at a given pressure regardless of heating history. The study was also extended to a range of pressures from 31.4 to 88.3 MPa to generate the pressureassisted master sintering surface (PMSS).

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Section: Resultssupporting

confidence: 88%

The Pressure-Assisted Master Sintering Surface of Metallic Powder Mixture

Han

Kim

2010

Mater. Trans.

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“…The effect of SiO 2 on the sintering is very complex and has been discussed in the literature [13,14,22]. In our research, the combination using of MgO and SiO 2 can greatly enhance the densification for YAG ceramics.…”

Section: Resultsmentioning

confidence: 72%

Fabrication of Nd:YAG transparent ceramics with both TEOS and MgO additives

Yang

Qin

Zhang

et al. 2011

Journal of Alloys and Compounds

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“…14,15) However, the effective activation energy for the present research was equivalent to that of self diffusion in Cu and no further decrease was found by adding Sn. This might be due to the fact that the 2 mass% Sn was not enough to make measurable difference of the apparent activation energy.…”

Section: Resultsmentioning

confidence: 50%

Modeling of Densification during Hot Pressing of Fe-Cu-Co-Ni-W-Sn Powder Mixture

2011

Mater. Trans.

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The master sintering curve (MSC) is an effective method to predict densification during sintering or hot pressing. In MSC, the sintered density is a unique function of the integral of a temperature function over time, irrespective of the heating path. As a practical application of the MSC, the Fe-based powder mixture consisting of 6 different metallic materials was used since it is one of the most common soft metal-bonds of the diamond tool industry. The effective activation energy of sintering was found to be 200.2 kJ/mol. It suggests that the dominant densification mechanism for the present metallic powder was the diffusion of Cu since the effective activation energy was in good agreement with that of self diffusion in Cu from literature. Three data sets having different heating rates merged onto a single curve when the density was plotted as a logarithmic function of Â, the integral of temperature function over time. Thus, the density versus Â profile can be used to predict the final density of Fe-based metallic powder at a given pressure regardless of heating history. The study was also extended to a range of pressures from 9.7 MPa to 58.1 MPa to generate the pressure-assisted master sintering surface (PMSS). [doi:10.2320/matertrans.M2011056] (Received February 15, 2011; Accepted March 11, 2011; Published May 18, 2011) Keywords: iron-based metallic powder, pressure-assisted master sintering surface, master sintering curve, self diffusion of Cu

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Mechanism of the liquid-phase sintering for Nd:YAG ceramics

Cited by 101 publications

References 21 publications

The Pressure-Assisted Master Sintering Surface of Metallic Powder Mixture

The Pressure-Assisted Master Sintering Surface of Metallic Powder Mixture

Fabrication of Nd:YAG transparent ceramics with both TEOS and MgO additives

Modeling of Densification during Hot Pressing of Fe-Cu-Co-Ni-W-Sn Powder Mixture

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