Transient liquid-phase sintering

Chick LA, Kiu J, Stevenson JW, Armstrong TA, McCready DE, Maupin GD, Coffey GW, and Coyle CA. Phase transitions and transient liquid-phase sintering in calcium-substituted lanthanum chromite. J. Am. Ceram. Soc. 1997 80 2109-2120. 

Effects of particle size and pressure on the reactive sintering were studied by Gobran et al. (2004). The synthesis of RuAl was described it was observed that reactive systems containing low-melting constituents such as aluminium are assisted in densification by the formation of a transient liquid phase. Reactive sintering using... 

Another key parameter is the solubility of the solid in the liquid. The common requirement is for the solid to be soluble in the liquid but for the liquid to have a low solubility in the solid. This requirement leads to a liquid that persists during sintering. A high liquid solubility in the solid leads to a transient liquid phase and swelling of the compact during heating. 

Jackson et al. [169] have sintered SiC at temperatures between 1850°C and 1950°C using a transient liquid phase produced by the carbothermal reduction of AI2O3 by... 

Aluminum is an effective sintering aid for B4C and SiC ceramics if combined with elemental boron and carbon. Phase relations in the B-C-Al-Si system may hence indicate suitable procedures to initiate transient liquid phase or enhanced solid-state sintering. Furthermore, liquid A1 may be used to infiltrate porous B4C bodies acting as a reinforcing phase. 

Xiong Y, Wang H, Fu Z (2013) Transient liquid-phase sintering of AIN ceramics with CaF2 additive. J Eur Ceram Soc 33 2199-2205... 

In a solid-liquid two phase system, the solid can be dissolved in the liquid and the liquid can also be dissolved in the solid. A high solubility of the solid in the liquid will facilitate potentially a high mass transport rate through the liquid layer, which is the basic requirement of liquid-phase sintering. However, the dissolving of the liquid in the solid is totally prevented, otherwise the compact would be severely swelling due to the formation of transient liquid phases. The effect of solubUily on densification and swelling of the compact is demonstrated schematically in Fig. 5.33 [73]. 

In addition to solid state and liquid phase sintering, other types of sintering, for example, transient liquid phase sintering and viscous flow sintering, can be... 

In reactive liquid sintering, due to reduced sintering temperatures ( transient liquid phase sintering ). 

S. D. Nunn and T. Y. Tien, "Fabrication of Si3N4/SiC Composites by Transient Liquid Phase Sintering," Semi-annual report submitted to ORNL under Contract No. SC-19X-SA125C, October, 1989. 

Fabrication of Si N /S C Composites by Transient Liquid Phase Sintering (University of Michigan). . 150... 

Fig. 16. Schematic of a joint formed using transient liquid phase sintering conductive adhesives, (a) Initial state after chip attachment and before temperature reach the melting point of the low-melting-alloy filler, (b) The low-melting-alloy fillers start to melt and dissolve the high-melting-alloy filler, (c) After the high-melting-alloy fillers are completely dissolved, the liquid metal phase solidifies and forms a three-dimensional network in the joint.

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