Jacques Maritain

Nickl, Peter

doi:10.30965/9783657768196

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“…In the case of the hot-pressed Ti3SiC2 sample at 1550 °C, hardness of 7.1 GPa has been reported, which according to the corresponding X-ray diffraction pattern, is attributed to the presence of TiC in the sample as the main peak resulting from the decomposition of Ti3SiC2 at 1550 °C. By increasing the temperature, also there is high TiC particles in this sample but grain growth over comes to the high hardness of TiC particles (28)(29)(30)(31)(32)(33)(34)(35) and causes the decrease in the hardness. Fig.…”

Section: Characterization Of the Samplesmentioning

confidence: 87%

“…Therefore, it is important to make high purity and fully dense bulk Ti3SiC2 samples. Zhou et al [31] were the first who synthesize the ternary compound via a chemical reaction between Si, graphite, and TiH2, at 2000 ºC, followed by the work of Nickl et al [32] by using the chemical vapour deposition (CVD) method. During the last decade, different methods have been used to synthesize bulk Ti3SiC2, such as hot isostatic pressing (HIP), reactive sintering, arc melting, hot pressing (HP), and others.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and mechanical properties of Ti3SiC2 MAX phases sintered by hot pressing

Amiri

Vafa

2021

Synth. Sinter.

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The Ti3SiC2 used in this project has been purchased ready-made. This study aimed to investigate the effect of sintering temperature on samples' microstructure and mechanical properties, including three-point flexural strength, Vickers hardness, and fracture toughness. Therefore, Ti3SiC2 samples were sintered under a vacuum atmosphere at a pressure of 35 MPa for 30 minutes at two temperatures of 1500 °C and 1550 °C by hot pressing. The microstructure obtained from the fracture cross-section of the samples shows that by increasing the sintering temperature to 1550 °C, the microstructure of this sample becomes larger than the sintered sample at 1500 °C. Also, increasing the sintering temperature to 1550 °C causes the decomposition of Ti3SiC2 to TiC, which can be seen in the X-ray diffraction pattern (XRD). In addition, the relative density of the sintered sample at 1550 °C is 98.08% which is higher than that of the sintered sample at 1500 °C with the result of 89%. On the other hand, the three-point flexural strength (227.5 MPa), the Vickers hardness (~9 GPa), and the fracture toughness (8.6 MPa.m1/2) of the sintered sample at 1500 °C are higher due to the fine-grained structure.

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Section: Characterization Of the Samplesmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Ti3SiC2 MAX phases sintered by hot pressing

Amiri

Vafa

2021

Synth. Sinter.

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Being a Christian in Europe

Op¹

1995

New Blackfriars

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What do we mean when we say ‘Europe’ and write about Europe as ‘a challenge to Christians’? What does it mean to be a European Christian, or rather to be a Christian in Europe? What is the identity of Europe? Identity is closely linked to memory. When a person loses his or her memory, this person’s identity is in danger of getting lost as well. There is a common European memory. This memory is weaker than our national memory and our personal memory, but it exists. It is built up out of numerous elements including: the boundaries of Europe, interdependence, cultural heritage, technological civilization, justice, individualism, fear of Islam, and the Christian past.Boundaries are vital in determining one’s identity. They fulfil the need for belonging and help to structure life. The boundaries of Europe, however, are very uncertain. When I arrived in Oxford in 1966 as a postgraduate student, I was told that this city of dreaming spires and towers was not a part of Europe. Europe was ‘the continent’; the British Isles did not belong to Europe. Ten months later I travelled to Spain. I learned that, surely, Oxford belonged to Europe, for everything north of Spain was Europe; Spain, however, was not a part of Europe. When I lectured for some days in the Catholic University of Lublin, Poland, in 1988, I was told by my hosts that Poland really is the heart of Europe. The little medieval chapel of Lublin castle was supposed to prove their point: gothic on the outside, Byzantine on the inside.

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Jacques Maritain

Cited by 2 publications

References 0 publications

Microstructure and mechanical properties of Ti3SiC2 MAX phases sintered by hot pressing

Microstructure and mechanical properties of Ti3SiC2 MAX phases sintered by hot pressing

Being a Christian in Europe

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