Hydrogen permeation characteristics of multi-phase Ni-Ti-Nb alloys
Hydrogen permeation characteristics of multi-phase Ni-Ti-Nb alloys
复制标题
DOI：
10.1016/j.jallcom.2003.08.064
复制
发表时间：
2004-04-14
影响因子：
6.2
通讯作者：
Aoki, K
中科院分区：
文献类型：
--
作者：
Hashi, K;Ishikawa, K;Aoki, K
采用质量流量计研究了Ni-Ti-Nb三元合金在上游侧压力0.2- 0.97MPa、温度523-673 K范围内的氢渗透特性。氢渗透通过铸态合金与Ti和Ni的20摩尔%和更少的，不能测量脆性和氢脆，分别。韧性B2-NiTi相的氢渗透率为10（-10）mol H，（m（-1）s（-1）Pa-0.5），并且当与Nb合金化时增加。Ni 30 Ti 31 Nb 39合金在673 K下的氢渗透率为1.93 × 10（-8）mol H（m（-1）s（-1）Pa-0.5），这与在相同条件下测量的纯Pd的氢渗透率相当。Ni 30 Ti 31 Nb 39合金由初生相bcc-NbTi和共晶相NiTi + NbTi组成。共晶相在防止NbTi相的氢脆中起主要作用，而NbTi相主要对该双相合金的氢渗透起作用。本文首次观察到氢在复相合金中的渗透现象。(C)2003 Elsevier B. V.保留所有权利。
Hydrogen permeation characteristics of ternary Ni-Ti-Nb alloys were investigated using a mass flow meter in the pressure range of 0.2-0.97 MPa on the upstream side and the temperature range of 523-673 K. Hydrogen permeation through the as-cast alloys with Ti and Ni of 20 mol% and less could not be measured by brittleness and by hydrogen brittleness, respectively. Hydrogen permeability of the ductile B2-NiTi phase was 10(-10) mol H, (m(-1) s(-1) Pa-0.5), and increased when alloying with Nb. The Ni30Ti31Nb39 alloy provided a hydrogen permeability of 1.93 x 10(-8) mol H, (m(-1) s(-1) Pa-0.5) at 673 K, which was equivalent to that of pure Pd measured under the same conditions. The Ni30Ti31Nb39 alloy consisted of the primary phase, bcc-NbTi, and the eutectic phases, NiTi + NbTi. The eutectic phases played a major role in prevention of hydrogen brittleness of the NbTi phase, while the NbTi phase contributed mainly to the hydrogen permeation of this duplex alloy. This paper represents the observation of hydrogen permeation in the multiphase alloys for the first time. (C) 2003 Elsevier B.V. All rights reserved.