Liquid phase sintering of rare earth–iron (Dy0.7Tb0.3Fe2) magnetostrictive materials

1978 ◽  
Vol 49 (3) ◽  
pp. 1972-1974 ◽  
Author(s):  
J. J. Croat
Keyword(s):  
Rare Earth ◽  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Magnetostrictive Materials

The effect of rare earth oxides on the pressureless liquid phase sintering of α-SiC

2014 ◽  
Vol 34 (12) ◽  
pp. 2865-2874 ◽  
Author(s):  
Hanqin Liang ◽  
Xiumin Yao ◽  
Jingxian Zhang ◽  
Xuejian Liu ◽  
Zhengren Huang
Keyword(s):  
Rare Earth ◽  
Liquid Phase ◽  
Rare Earth Oxides ◽  
Liquid Phase Sintering

Effect of Rare-Earth Oxides Additive on Liquid Phase Sintered SiC

2014 ◽  
Vol 602-603 ◽  
pp. 407-411 ◽  
Author(s):  
Yu Hong Chen ◽  
Liang Jiang ◽  
Li Li Zhang ◽  
Zhen Kun Huang ◽  
Lan Er Wu
Keyword(s):  
Fracture Toughness ◽  
Rare Earth ◽  
Liquid Phase ◽  
Bending Strength ◽  
Sintered Sample ◽  
Linear Shrinkage ◽  
Rare Earth Oxides ◽  
Liquid Phase Sintering ◽  
Fine Grained ◽  
Cationic Radius

The densification of α-SiC occurred by liquid-phase sintering mechanism with AlN-RE2O3(RE=Nd, Gd, Y, Lu) was studied. The total additive content was fixed at 15 wt%. Cold isostatically pressed samples were sintered at 1800-1950 °C under N2atmosphere for 1 h. The linear shrinkage and weight loss of the samples were about 17-20% and 2-5%, respectively. The mechanical properties and microstructure of sintered samples were investigated. The experimental results showed that the fracture toughness of samples was 6-8 MPa·m1/2, the hardness was in the range of 18-21 GPa and the bending strength was in the range of 400-500 MPa. It was found that a decrease in the cationic radius of the rare-earth oxides was accompanied by an increase in hardness and flexural strength of the SiC ceramics, whereas the fracture toughness was improved by incorporating rare-earth oxides of larger cationic radius. The morphology (SEM) of sintered sample showed a fine grained microstructure with equiaxed grains. Fracture mode was intergranular fracture.

scholarly journals Liquid Phase Sintering and Mechanical Properties of SiC with Rare-Earth Oxide

2006 ◽  
Vol 114 (1327) ◽  
pp. 247-252 ◽  
Author(s):  
Shuhei TABATA ◽  
Yoshihiro HIRATA ◽  
Soichiro SAMESHIMA ◽  
Naoki MATSUNAGA ◽  
Kazuya IJICHI
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Liquid Phase ◽  
Rare Earth Oxide ◽  
Liquid Phase Sintering

Effect of furnace atmosphere and silica content on the consolidation behaviour of magnesia partially stabilised zirconia

1990 ◽  
Vol 48 (4) ◽  
pp. 1056-1057
Author(s):  
J. Drennan ◽  
R.H.J. Hannink ◽  
D.R. Clarke ◽  
T.M. Shaw
Keyword(s):  
Liquid Phase ◽  
Silica Content ◽  
Liquid Phase Sintering ◽  
Furnace Atmosphere ◽  
Boundary Phase ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Series Of Experiments ◽  
Compositional Gradients ◽  
Mobile Liquid

Magnesia partially stabilised zirconia (Mg-PSZ) ceramics are renowned for their excellent nechanical properties. These are effected by processing conditions and purity of starting materials. It has been previously shown that small additions of strontia (SrO) have the effect of removing the major contaminant, silica (SiO2).The mechanism by which this occurs is not fully understood but the strontia appears to form a very mobile liquid phase at the grain boundaries. As the sintering reaches the final stages the liquid phase is expelled to the surface of the ceramic. A series of experiments, to examine the behaviour of the liquid grain boundary phase, were designed to produce compositional gradients across the ceramic bodies. To achieve this, changes in both silica content and furnace atmosphere were implemented. Analytical electron microscope techniques were used to monitor the form and composition of the phases developed. This paper describes the results of our investigation and the presentation will discuss the work with reference to liquid phase sintering of ceramics in general.

Microstructure and microanalysis of sintered Fe-Nd-B permanent magnets

1990 ◽  
Vol 48 (4) ◽  
pp. 990-991
Author(s):  
Mahesh Chandramouli
Keyword(s):  
Electron Microscope ◽  
Liquid Phase ◽  
Permanent Magnets ◽  
Phase Distribution ◽  
Energy Dispersive Spectrometer ◽  
Nucleation And Growth ◽  
Liquid Phase Sintering ◽  
Domain Wall Energy ◽  
Oxide Phases ◽  
Scanning Electron

Magnetization reversal in sintered Fe-Nd-B, a complex, multiphase material, occurs by nucleation and growth of reverse domains making the isolation of the ferromagnetic Fe14Nd2B grains by other nonmagnetic phases crucial. The magnets used in this study were slightly rich in Nd (in comparison to Fe14Nd2B) to promote the formation of Nd-oxides at multigrain junctions and incorporated Dy80Al20 as a liquid phase sintering addition. Dy has been shown to increase the domain wall energy thus making nucleation more difficult while Al is thought to improve the wettability of the Nd-oxide phases.Bulk polished samples were examined in a JEOL 35CF scanning electron microscope (SEM) operated at 30keV equipped with a Be window energy dispersive spectrometer (EDS) detector in order to determine the phase distribution.

SOLID SOLUTION FORMATION DURING LIQUID PHASE SINTERING

1986 ◽  
Vol 47 (C1) ◽  
pp. C1-441-C1-445
Author(s):  
E. KOSTIĆ ◽  
S. J. KISS ◽  
D. CEROVIĆ
Keyword(s):  
Solid Solution ◽  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Solid Solution Formation ◽  
Solution Formation

Microstructure development during liquid-phase sintering

2005 ◽  
Vol 96 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Sung-Min Lee ◽  
Suk-Joong L. Kang
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Microstructure Development

ChemInform Abstract: Liquid Phase Sintering of Silicon Carbide.

ChemInform ◽  
2010 ◽  
Vol 27 (32) ◽  
pp. no-no
Author(s):  
F. K. VAN DIJEN ◽  
E. MAYER
Keyword(s):  
Silicon Carbide ◽  
Liquid Phase ◽  
Liquid Phase Sintering

scholarly journals Synthesis and Na+ Ion Conductivity of Stoichiometric Na3Zr2Si2PO12 by Liquid-Phase Sintering with NaPO3 Glass

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3790
Author(s):  
Yongzheng Ji ◽  
Tsuyoshi Honma ◽  
Takayuki Komatsu
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
Ion Conductivity ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Sintering Time ◽  
Lower Activation

Sodium super ionic conductor (NASICON)-type Na3Zr2Si2PO12 (NZSP) with the advantages of the high ionic conductivity, stability and safety is one of the most famous solid-state electrolytes. NZSP, however, requires the high sintering temperature about 1200 °C and long sintering time in the conventional solid-state reaction (SSR) method. In this study, the liquid-phase sintering (LPS) method was applied to synthesize NZSP with the use of NaPO3 glass with a low glass transition temperature of 292 °C. The formation of NZSP was confirmed by X-ray diffraction analyses in the samples obtained by the LPS method for the mixture of Na2ZrSi2O7, ZrO2, and NaPO3 glass. The sample sintered at 1000 °C for 10 h exhibited a higher Na+ ion conductivity of 1.81 mS/cm at 100 °C and a lower activation energy of 0.18 eV compared with the samples prepared by the SSR method. It is proposed that a new LPE method is effective for the synthesis of NZSP and the NaPO3 glass has a great contribution to the Na+ diffusion at the grain boundaries.

Sign in / Sign up

Export Citation Format

Share Document