Two-Step Sintering of oxide ceramics with various crystal structures

Maca, Karel; Pouchlý, Václav; Zalud, Pavel

doi:10.1016/j.jeurceramsoc.2009.06.008

Cited by 101 publications

(52 citation statements)

References 38 publications

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“…Fully dense ceramics with uniform microstructure and fine grain size is essential to stabilize the tetragonal phase as well as to improve the mechanical properties such as hardness and toughness. There are many TSS profiles conducted to control the grain growth of Y-TZP ceramics [1,4,5,8,[24][25][26][27][28][29][30][31]61]. Only few researchers successfully obtained fully dense ceramics with controlled grain growth (<5 times of powder size) [1,4,5,25,28,29,31,62].…”

Section: Y-tzp Ceramicsmentioning

confidence: 99%

“…TSS successfully applied doped and pure alumina [5,24,25,[35][36][37][38][39][40][41]. Bodišová et al [36] and others [5,25,35,37,39] successfully sintered fully dense alumina (98%) with controlled grain growth (grain growth below five times than that of powder size). Furthermore, the sample sintered with TSS exhibits excellent hardness (18 GPa) and fracture toughness (4 MPam 1/2 ) [35].…”

Section: Sintering Of Aluminium-based Ceramicsmentioning

confidence: 99%

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Two-Step Sintering of Ceramics

Sutharsini¹,

Murugathas²,

RameshSingh³

2018

Sintering of Functional Materials

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Sintering is a critical phase in the production of ceramic bodies. By controlling the density and microstructure formation, sintering now emerged as a processing technology of ceramic materials. Tailoring the structural, mechanical, electrical, magnetic and optical properties is widening the application of ceramics in various fields. Recently, many advanced sintering methods have reported to fabricate ceramic materials with controlled properties. Two-stage sintering (TSS) is one of the simple and cost-effective methods to obtain near-theoretical density materials with controlled grain growth without adding any dopants. Many recent works have reported the use of TSS as a processing method to fabricate nanoceramics for various applications. With this background, this chapter reviews the advantages of TSS in ceramic preparation based on properties and materials and explores the future directions.

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Section: Y-tzp Ceramicsmentioning

confidence: 99%

Section: Sintering Of Aluminium-based Ceramicsmentioning

confidence: 99%

Two-Step Sintering of Ceramics

Sutharsini¹,

Murugathas²,

RameshSingh³

2018

Sintering of Functional Materials

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“…[8] On the other hand, a two-step sintering process was recently proposed starting at a short holding period at high temperature followed by a longer holding period at lower temperature. [9] It was reported that this process can also lead to more homogenous microstructures.…”

Section: Introductionmentioning

confidence: 99%

Parameters for Inherently Homogeneous Sintering Processes

Raether¹

2015

Adv Eng Mater

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Thermodynamic criteria are introduced to calculate the driving force for the formation of heterogeneous metastable states during sintering. As already shown for one special case of liquid phase sintering, these metastable states significantly affect the reliability of sintered ceramics. Inherently safe sintering processes are proposed, providing a homogeneous evolution of microstructure. A desintering parameter is defined which can be used for a quantitative evaluation of different sintering processes in terms of their tendency for formation of heterogeneity. The desintering parameter has been calculated using sintering simulations in 3D representative volume elements. For that, a deterministic model has been developed. It considers interface energy minimization and grain growth for random arrangements of particles. Computational effort could be significantly reduced by periodic continuation of the microstructure at the sides of the RVE. Basic parameters controlling inherently homogeneous sintering are presented. Surface diffusion is positive at large dihedral angles. Unexpectedly, grain growth can be advantageous as well, provided that it acts continuously during the entire sintering cycle.

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“…In particular, two-step sintering has n been widely applied to many materials owing to its ability to effectively control the grain growth (the first step) and densification of ceramics (the second step). It is reported [13][14][15][16][17] that a homogeneous microstructure with small grains can be obtained by the two-step sintering process, which could be applied to improve the Qf value of Zn 2 SiO 4 ceramics.…”

Section: Introductionmentioning

confidence: 99%