Failure mechanisms of Al2O3 with different glass phase content at cryogenic temperatures

Transparent MgO ceramics are successful fabricated via spark plasma sintering at lower temperature using the high sintering activity powders synthesized by precipitated method. The samples were detected by XRD, SEM, TEM, BET, UV‐Vis‐NIR, microhardness, and so on. The results show that all ceramics prepared at 700°C‐900°C are visually transparent and the sample sintered at 860°C for 5 min exhibits the superior transmittance of 60% (800 nm). It is also found that the mechanical and thermal properties of MgO ceramics are all increasing firstly and then decreasing with the increase in the sintering temperature. And the maximum value of hardness, fracture toughness, MSP strength, and Young's modulus of MgO ceramics is 8.25 GPa, 2.01 MPa·m1/2, 206 MPa, and 286 GPa, respectively. Moreover, the thermal conductivity of MgO ceramics sintered at 860°C can reach 48.4 W/mK at room temperature.

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Interface transition layer interaction mechanism for ZTA_P/HCCI composites

Zhou

Jiang

Chong

2017

Science and Engineering of Composite Materials

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ZrO2-toughened Al2O3 (ZTA, 40%) ceramic particles reinforced by high chromium cast iron (HCCI) matrix composites were fabricated by casting infiltration. The interaction between the ZTA ceramic particles and the matrix by the interface transition layer (ITL) was investigated. From the perspective of interfacial bonding, the ceramic particles and HCCI experienced metallurgical bonding by the ITL. Electron probe microanalysis results demonstrated that Cr, Fe, and Mn diffused from the matrix to the ITL. Transmission electron microscopy revealed that the main phases in the transition layer were glassy. The wear resistance of the composites with the transition layer was better than those without, as indicated by the three-body abrasive wear tester.

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Failure mechanisms of Al2O3 with different glass phase content at cryogenic temperatures

Cited by 3 publications

References 26 publications

Spark plasma sintering of HUST-1 lunar regolith simulant and its thermal shock resistance properties

Spark plasma sintering of HUST-1 lunar regolith simulant and its thermal shock resistance properties

Properties of MgO transparent ceramics prepared at low temperature using high sintering activity MgO powders

Interface transition layer interaction mechanism for ZTA_P/HCCI composites

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Failure mechanisms of Al2O3 with different glass phase content at cryogenic temperatures

Cited by 3 publications

References 26 publications

Spark plasma sintering of HUST-1 lunar regolith simulant and its thermal shock resistance properties

Spark plasma sintering of HUST-1 lunar regolith simulant and its thermal shock resistance properties

Properties of MgO transparent ceramics prepared at low temperature using high sintering activity MgO powders

Interface transition layer interaction mechanism for ZTAP/HCCI composites

Contact Info

Product

Resources

About

Interface transition layer interaction mechanism for ZTA_P/HCCI composites