Simultaneous Synthesis and Sintering of α‐Ti 1– x Al x (N) (0 ≤ x ≤ 0.08) by a Self‐Propagating High‐Temperature Combustion Method
Simultaneous synthesis and sintering of hexagonal α‐Ti 1− x ‐Al x (N) (0 ≤ x ≤ 0.08) solid solutions, which contain a small amount of nitrogen, have been performed by a self‐propagating high‐temperature combustion method under a nitrogen pressure of 4 MPa. Dense materials (∼99% of theoretical) prepa...
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| Published in | Journal of the American Ceramic Society Vol. 87; no. 11; pp. 2042 - 2046 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2004
|
| Online Access | Get full text |
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| Summary: | Simultaneous synthesis and sintering of hexagonal α‐Ti
1−
x
‐Al
x
(N) (0 ≤
x
≤ 0.08) solid solutions, which contain a small amount of nitrogen, have been performed by a self‐propagating high‐temperature combustion method under a nitrogen pressure of 4 MPa. Dense materials (∼99% of theoretical) prepared directly from a mixture of elemental (Ti and Al) powders reveal homogeneous microstructure composed of fine grains (12–16 μm). α‐Ti
1−
x
Al
x
(N) (
x
= 0.02; Ti
0.98
Al
0.02
N
0.26
) exhibits a three‐point bending strength σ
b
of 390 MPa, a Vickers hardness
H
v
of 9.24 GPa, and a fracture toughness
K
IC
of 4.89 MPa·m
1/2
; their mechanical properties are much improved by doping Al into α‐Ti(N), in comparison with those (σ
b
= 245 MPa,
H
v
= 9.02 GPa, and
K
IC
= 3.77 MPa·m
1/2
) of α‐Ti(N) fabricated under the same conditions. |
|---|---|
| ISSN: | 0002-7820 1551-2916 |
| DOI: | 10.1111/j.1151-2916.2004.tb06357.x |