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GENERAL INFORMATION

1. Title of website:
	Neutron diffraction assessment at extreme temperatures to gain insights into the performance of 
	thermocouple coatings. Part 1. [Dataset]

2. Contributor information:
	Irungu, Beth 
	Faisal, Nadimul (Robert Gordon University)
	Lee, Tung Lik
	Goel, Saurav
	Ismail, Mubarak Abdelrasoul Elnour
	
3. Date on which website first launched:
	2025-03-14
	

ACCESS INFORMATION

1. Release Date and Access Link:
	This file is due to be publicly released on the 15th March 2028. Full metadata is available from 
	the ISIS neutron and muon source data journal: https://doi.org/10.5286/ISIS.E.RB2510004-1

	
2. Recommended citation:
	IRUNGU, B., FAISAL, N., LEE, T.L., GOEL, S. and ISMAIL, M.A.E. 2025. Neutron diffraction 
	assessment at extreme temperatures to gain insights into the performance of thermocouple 
	coatings. Part 1. [Dataset]. Hosted on STFC ISIS neutron and muon source data journal [online]. 
	Available from: https://doi.org/10.5286/ISIS.E.RB2510004-1
	
	
CONTEXTUAL INFORMATION

1. Abstract:
	This project investigates the behaviour of Chromel-Alumel K-type thermocouples under extreme 
	temperature conditions, focusing on coatings produced through thermal spray processes. These 
	thermocouples, widely used in industrial and aerospace applications, experience phase changes 
	that can compromise temperature accuracy, particularly in cryogenic environments. While bulk 
	material behaviour is well-documented, the performance of thin films and coatings remains 
	poorly understood, especially under high and low temperatures. The proposed study employs 
	neutron diffraction to assess in-situ phase transformations and residual stress effects in 
	Ni-20Cr coatings. Neutron diffraction's deep material penetration and high resolution make 
	it ideal for probing changes across coating thicknesses. The project will investigate the 
	influence of residual stress on phase transformations, contributing to improved thermocouple 
	calibration and performance in cryogenic and high-temperature applications. By addressing 
	these material challenges, the research aligns with ongoing UK government initiatives to 
	digitalize manufacturing processes, building on previous EPSRC-funded projects and supporting 
	the completion of a PhD thesis on thermal spray coatings with embedded sensing capabilities.