Reactive Hot Pressing and Properties of Nb2AlC
Zhang, Wei1; Travitzky, Nahum1; Hu, Chunfeng2; Zhou, Yanchun2; Greil, Peter1
Corresponding AuthorTravitzky, Nahum(
AbstractDense Nb2AlC ceramic was synthesized from NbC, Nb, and Al powder mixture at 1650 degrees C and a pressure of 30 MPa for 90 min using an in situ reaction/hot-pressing method. The reaction kinetics, microstructure, physical, and mechanical properties of the fabricated material were investigated. A thermal expansion coefficient of similar to 8.1 x 10(-6) K-1 was measured in the temperature range of 30 degrees-1050 degrees C. At room temperature a thermal conductivity of similar to 20 W. (m. K)(-1) and a Vickers hardness of similar to 4.5 GPa were determined. The material attained Young's modulus, four-point bending strength and fracture toughness of similar to 294 GPa, similar to 443 MPa, and similar to 5.9 MPa. m(1/2), respectively. The nanolayered grains with a mean grain size of 17 mu m contributed to the damage tolerance of this ceramic. Quenching from 600 degrees, 800 degrees, and 1000 degrees C into water at room temperature resulted in decrease in bending strength from 443 MPa for the as-synthesized Nb2AlC to 391, 156, and 149 MPa, respectively.
Indexed BySCI
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000270188300037
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Cited Times:34[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorTravitzky, Nahum
Affiliation1.Univ Erlangen Nurnberg, Dept Mat Sci, D-91058 Erlangen, Germany
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Wei,Travitzky, Nahum,Hu, Chunfeng,et al. Reactive Hot Pressing and Properties of Nb2AlC[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2009,92(10):2396-2399.
APA Zhang, Wei,Travitzky, Nahum,Hu, Chunfeng,Zhou, Yanchun,&Greil, Peter.(2009).Reactive Hot Pressing and Properties of Nb2AlC.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,92(10),2396-2399.
MLA Zhang, Wei,et al."Reactive Hot Pressing and Properties of Nb2AlC".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 92.10(2009):2396-2399.
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