Preparation and Mechanical Property of the Ceramic-reinforced Cr0.5MoNbWTi Refractory High-entropy Alloy Matrix Composites

Shasha LÜ; Yufei ZU; Guoqing CHEN; Bojun ZHAO; Xuesong FU; Wenlong ZHOU

doi:10.15541/jim20200479

Journals >Journal of Inorganic Materials >Volume 36 >Issue 4 >Page 386 > Article

Journal of Inorganic Materials
Vol. 36, Issue 4, 386 (2021)

Preparation and Mechanical Property of the Ceramic-reinforced Cr_0.5MoNbWTi Refractory High-entropy Alloy Matrix Composites

Shasha LÜ¹, Yufei ZU², Guoqing CHEN^1、*, Bojun ZHAO¹, Xuesong FU¹, and Wenlong ZHOU¹

Author Affiliations

¹1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China

²2. Key Laboratory of Advanced Technology for Aerospace Vehicles (Liaoning Province), School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116085, China

show less

DOI: 10.15541/jim20200479 Cite this Article

Shasha LÜ, Yufei ZU, Guoqing CHEN, Bojun ZHAO, Xuesong FU, Wenlong ZHOU. Preparation and Mechanical Property of the Ceramic-reinforced Cr_0.5MoNbWTi Refractory High-entropy Alloy Matrix Composites[J]. Journal of Inorganic Materials, 2021, 36(4): 386 Copy Citation Text

show less

1. XRD patterns of the powders mechanically milled for different time

Download full size | View in the Article

$SEM images of the ceramic-reinforced refractory high-entropy alloys matrix composite$

2. SEM images of the ceramic-reinforced refractory high-entropy alloys matrix composite

Download full size | View in the Article

3. XRD pattern of the as-sintered composite

Download full size | View in the Article

4. Backscattered electron SEM image (a) and the corresponding EPMA mappings (b-i) of the alloying components in the composite

Download full size | View in the Article

5. Gibbs free energies of the reactions between the nonmetallic and metallic elements as a function of temperature

Download full size | View in the Article

$Engineering stress-strain curves of the composite at room temperature and 1400 ℃ (a); Comparison of mechanical properties of the typical refractory HEAs (b)$

6. Engineering stress-strain curves of the composite at room temperature and 1400 ℃ (a); Comparison of mechanical properties of the typical refractory HEAs (b)

Download full size | View in the Article

Sample	C/wt%	O/wt%	N/wt%
Mixture before ball milling	0.044	0.448	0.046
Mixture after ball milling	0.482	2.181	3.920

Table 1. Concentrations of C, N, and O in the raw powders and as-milled powders

View in the Article

	Cr	Mo	Nb	W	Ti	Fe	C	O	N
BCC	15.25	34.17	8.21	37.15	0.58	4.25	0.39	0	0
(Nb,Ti) (N,C)	1.38	0.39	31.73	0.03	18.37	0.12	9.95	4.51	33.52
Ti₂O₃	1.18	0.81	1.32	0.71	35.14	0.21	0.96	59.66	0.01

Table 2. Chemical compositions (at%) of the phases in the as-sintered composite

View in the Article

Enthalpy of mixing/(kJ·mol^-1)/Electronegativity difference	Cr	Mo	Nb	W	Ti
C*	-61/0.89	-67/0.39	-102/0.95	-60/0.85	-109/1.01
N*	-107/1.38	-115/0.88	-174/1.44	-103/1.34	-190/1.50
O**	-205/1.78	-174/1.28	-307/1.84	-164/1.74	-327/1.90

Table 3. Enthalpy of mixing and electronegativity difference between nonmetallic elements and metallic elements

Download Citation

Save the article for my favorites

Paper Information