Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Claire Utton"'
Publikováno v:
Alloys, Vol 3, Iss 1, Pp 59-95 (2024)
In this work, the refractory complex concentrated alloy (RCCA) 3.5Al–4Cr–6Ge–1Hf–5Mo–36Nb–22Si–1.5Sn–20Ti–1W (at.%) was studied in the as cast and heat treated conditions (100 h or 200 h at 1500 °C). There was strong macrosegregati
Externí odkaz:
https://doaj.org/article/3e0803a3e2f74ec2b80dcdc0be0c3f7b
Autor:
Simon J. Graham, Edward Gallagher, Gavin J. Baxter, Yunus Azakli, Joseph Weeks, Matthew Gelmetti, Neil D'Souza, Carl Boettcher, Bryan Roebuck, Panos Tsakiropoulos, Claire Utton
Publikováno v:
Journal of Materials Research and Technology, Vol 28, Iss , Pp 3217-3224 (2024)
A Nb-silicide based alloy with nominal composition Nb–18Ti–22Si–6Mo-1.5Cr–2Sn-1Hf (at. %), designed for high temperature aerospace applications, was produced via a powder metallurgy (PM) route. The raw elements were arc melted, crushed, and m
Externí odkaz:
https://doaj.org/article/78ba3959a72147f283e116eddf88abf8
Publikováno v:
Materials, Vol 15, Iss 13, p 4596 (2022)
In this paper, we present a systematic study of the as-cast and heat-treated microstructures of three refractory metal intermetallic composites based on Nb (i.e., RM(Nb)ICs), namely the alloys EZ2, EZ5, and EZ6, and one RM(Nb)IC/RCCA (refractory comp
Externí odkaz:
https://doaj.org/article/2edcf67e21584684b9ebc4774fd32e4c
Publikováno v:
Science and Technology of Advanced Materials, Vol 18, Iss 1, Pp 467-479 (2017)
Nb-silicide based alloys could be used at T > 1423 K in future aero-engines. Titanium is an important additive to these new alloys where it improves oxidation, fracture toughness and reduces density. The microstructures of the new alloys consist of a
Externí odkaz:
https://doaj.org/article/0eb256d505334a3387421b09a94763d8
Publikováno v:
Materials, Vol 13, Iss 20, p 4548 (2020)
We studied the microstructures and isothermal oxidation of the Nb-silicide-based alloys Nb-11.5Ti-18Si-5Mo-2W-4.9Sn-4.6Ge-4.5Cr-4.7Al-1Hf (JZ4) and Nb-21Ti-18Si-6.7Mo-1.2W-4.4Sn-4.2Ge-4Cr-3.7Al-0.8Hf (JZ5), calculated their average creep rate for the
Externí odkaz:
https://doaj.org/article/345914553a3645e3b14d62d94195f72c
Publikováno v:
Materials, Vol 13, Iss 17, p 3719 (2020)
The microstructures and properties of the alloys JZ3 (Nb-12.4Ti-17.7Si-6Ta-2.7W-3.7Sn-4.8Ge-1Hf-4.7Al-5.2Cr) and JZ3+(Nb-12.4Ti-19.7Si-5.7Ta-2.3W-5.7Sn-4.9Ge-0.8Hf-4.6Al-5.2Cr) were studied. The densities of both alloys were lower than the densities
Externí odkaz:
https://doaj.org/article/a9f2cd49690b491989478a992b89d491
Publikováno v:
Materials, Vol 13, Iss 7, p 1778 (2020)
In this paper two Nb-silicide-based alloys with nominal compositions (at.%) Nb-12Ti-18Si-6Ta-2.5W-1Hf-2Sn-2Ge (JZ1) and Nb-12Ti-18Si-6Ta-2.5W-1Hf-5Sn-5Ge (JZ2) were studied. The alloys were designed using the alloy design methodology NICE to meet spe
Externí odkaz:
https://doaj.org/article/99e6dc6aa7bc428ca73e213e476f4ee0
Publikováno v:
Materials, Vol 13, Iss 1, p 245 (2020)
This paper presents the results of a systematic study of Nb-24Ti-18Si based alloys with 5 at.% Sn addition. Three alloys of nominal compositions (at.%), namely Nb-24Ti-18Si-5Cr-5Sn (ZX4), Nb-24Ti-18Si-5Al-5Sn (ZX6), and Nb-24Ti-18Si-5Al-5Cr-5Sn (ZX8)
Externí odkaz:
https://doaj.org/article/b46e4744348f4159b2fabd1ddc8a70a9
Publikováno v:
Materials, Vol 12, Iss 19, p 3217 (2019)
The adhesion of the scale formed on Nb-silicide based alloys at 1473 K improves when Al and Sn are in synergy with Si and Ti. This improvement is observed when there is segregation of Sn in the microstructure below the alloy/scale interface and a lay
Externí odkaz:
https://doaj.org/article/b55aa67aeee84148aa0c4e07b8e721d1
Publikováno v:
Materials, Vol 12, Iss 17, p 2759 (2019)
The Al-Nb-Sn phase diagram was studied experimentally in the Nb-rich region to provide important phase equilibria information for alloy design of Nb-silicide based materials for aero engine applications. Three alloys were produced: Nb-17Al-17Sn, Nb-3
Externí odkaz:
https://doaj.org/article/09344cac08f641ad8fee6c8cc3b3871c