Densification behavior and properties of hot-pressed ZrC ceramics with Zr and graphite additives

Wang, Xingang; Guo, Wei‐Ming; Kan, Yanmei; Zhang, Guojun; Wang, Pei-Ling

doi:10.1016/j.jeurceramsoc.2011.01.005

Cited by 103 publications

(46 citation statements)

References 22 publications

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“…In the past, a combination of very high-temperature with pressure-assisted methods was necessary to produce fully densified ZrC components. Hot pressing is a common method for sintering of ZrC [1][2][3][4][5][6]. Nachiappan et al [4] investigated the influence of Zr and graphite ratio on sinterability.…”

Section: Introductionmentioning

confidence: 99%

“…A high Zr:C ratio promotes the sinterability as it is shown by this paper. Wang et al [5] added Zr or C for ZrC hot pressing experiments at temperatures between 1800 and 2000 ℃. The relative density of pure ZrC materials sintered at 2000 ℃ reaches 83%.…”

Section: Introductionmentioning

confidence: 99%

“…Basic investigations were conducted with regard to sub-stoichiometry or incorporation of oxygen for ZrC (meaning ZrC x O y with x < 1, y  1) powder processing and promotion of ZrC sintering by additives [4,5,9,[15][16][17]. These papers discuss specific effects of ZrC x O y composition in relation to sintering behavior.…”

Section: Introductionmentioning

confidence: 99%

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Pressureless sintering of ZrC with variable stoichiometry

2017

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This paper presents the experiments on the synthesis of zirconium carbide (ZrC) using carbothermal reduction of zirconia (ZrO 2 ). The ratio of ZrO 2 :C is used to adapt ZrC x O y with x < 1 or ZrC + C. The modification of ZrC x O y and the total carbon amount allows the use of pressureless sintering method in combination with sintering temperatures ≤ 2000 ℃. Fully densified ZrC products are obtained. The relevant details of ZrC formation are investigated by X-ray diffraction (XRD). The sintered products are characterized by XRD, field emission scanning electron microscopy (FESEM), as well as mechanical and electrical methods. XRD and FESEM investigations show that ZrC x O y is formed during the manufacturing process. The grain size and additional zirconia or carbon are related to the ZrO 2 :C ratio of the starting powder mixture. Bending strength up to 300 MPa, Young's modulus up to 400 GPa, fracture toughness up to 4.1 MPa·m 1/2 , and electrical resistance at room temperature around 10 4 Ω·cm are reached by the pressureless sintered ZrC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pressureless sintering of ZrC with variable stoichiometry

2017

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“…A C C E P T E D ACCEPTED MANUSCRIPT 2 Zirconium carbide (ZrC) has attracted increasing interest due to its high melting point (3540 o C) [1], great hardness (25.5 GPa) [2], relatively low density (6.64 g cm −3 ) and good ablation resistance [3][4][5][6], which make it attractive for aerospace applications such as hypersonic flight, atmospheric re-entry and rocket propulsion [7,8], where the operating temperature can be in excess of 3000 o C [6]. However, monolithic ZrC ceramic is very brittle and not practical for many applications [9,10].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Effects of Cf/C density on microstructure and properties of 3-D Cf/ZrC composites prepared by liquid metal infiltration

Zhu¹,

Lei²,

Yang³

et al. 2015

Composites Part B: Engineering

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“…Due to its superior physical and chemical properties, ZrC is widely used in cutting tools and ultra high temperature applications [1][2][3][4][5][6]. ZrC is an important far-infrared ceramic material [7] and is considered to be one of the promising inert matrix materials in high temperature nuclear reactors [8][9][10] due to its small neutron absorption crosssection [11,12].…”

Section: Introductionmentioning

confidence: 99%