TY - GEN
T1 - Degradation on L-605 heat resistant alloy used for mono-propellant thrusters
AU - Kajiwara, Kenichi
AU - Kagawa, Hideshi
AU - Goto, Daisuke
AU - Yamabe-Mitarai, Yoko
AU - Murakami, Hideyuki
AU - Ono, Yoshinori
AU - Kuroda, Daisuke
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Haynes25 (L-605) is a common heat resistant alloy used in mono-propellant structures and in screen materials for catalyst beds. The lifetime requirements for thrusters have expanded dramatically after studies conducted in the 1970s on mono-propellant materials used for achieving a long life. The material design had not changed for a long time, and L-605 was still used as thruster material due to its good heritage. Some important degradation incidents were found in the test-unit break-up inspection after the thruster life tests. The Japanese research team focused on the L-605 degradations found on the catalyst bed screen mesh used for mono-propellant thruster. The team analyzed the surface of the wire material and the cross-section of the wire screen mesh used in the life tests. The investigation showed that the degradation was caused by nitriding L-605 component elements. The team also suggested the installation of a platinum coating on the material surface as a L-605 nitric degradation measure.
AB - Haynes25 (L-605) is a common heat resistant alloy used in mono-propellant structures and in screen materials for catalyst beds. The lifetime requirements for thrusters have expanded dramatically after studies conducted in the 1970s on mono-propellant materials used for achieving a long life. The material design had not changed for a long time, and L-605 was still used as thruster material due to its good heritage. Some important degradation incidents were found in the test-unit break-up inspection after the thruster life tests. The Japanese research team focused on the L-605 degradations found on the catalyst bed screen mesh used for mono-propellant thruster. The team analyzed the surface of the wire material and the cross-section of the wire screen mesh used in the life tests. The investigation showed that the degradation was caused by nitriding L-605 component elements. The team also suggested the installation of a platinum coating on the material surface as a L-605 nitric degradation measure.
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M3 - Conference contribution
AN - SCOPUS:77957855507
SN - 9781563479762
T3 - 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
BT - 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
T2 - 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
Y2 - 2 August 2009 through 5 August 2009
ER -