典型文献
Excellent thermal shock resistance of NiCrAlY coatings on copper substrate via laser cladding
文献摘要：
Coatings are widely used to protect substrates in extreme thermal environments(e.g.,arc heaters),and thermal shock resistance is a crucial parameter for the coatings,which requires tight interlayer bond-ing between coatings and substrates.In this work,NiCrAlY coatings were highly required for the pure copper substrate to restrict the electric arc in arc heaters.To overcome the bonding difficulty of coating on the copper surface,the NiCrAlY coatings were prepared by two laser cladding methods:conventional laser cladding(CLC)and high-speed laser cladding(HSLC).The microstructure,composition,and ther-mal shock resistance of NiCrAIY cladding layers prepared by both methods were investigated.Benefitting from the high cooling rate and high energy density,the HSLC-layer has better composition uniformity and tighter interlayer bonding than the CLC-layer,achieving a 30％-45％improvement in thermal cycling lifetime.Besides,the NiCrAlY layers prepared on copper substrate by both laser cladding methods exhibit 3-10 times better thermal shock resistance than those NiCrAlY layers prepared by conventional spraying methods.It further confirms the great effects of metallurgical bonding and composition uniformity on the thermal shock resistance of coatings.The NiCrAlY layers fail in the form of internal cracking and interface peeling,and the corresponding failure mechanism is discussed.
文献关键词：
中图分类号：
作者姓名：
Mingyu Gao;Shunchao Li;Weimian Guan;Hongbin Xie;Xiaoxiang Wang;Jiabin Liu;Hongtao Wang
作者机构：
State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;Center for X-mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China
文献出处：
引用格式：
[1]Mingyu Gao;Shunchao Li;Weimian Guan;Hongbin Xie;Xiaoxiang Wang;Jiabin Liu;Hongtao Wang-.Excellent thermal shock resistance of NiCrAlY coatings on copper substrate via laser cladding)[J].材料科学技术（英文版）,2022(35):93-102
A类：
HSLC,NiCrAIY
B类：
Excellent,thermal,shock,resistance,NiCrAlY,coatings,copper,via,laser,cladding,Coatings,widely,used,protect,substrates,extreme,environments,arc,heaters,crucial,parameter,which,requires,interlayer,between,In,this,work,were,highly,required,pure,restrict,electric,To,overcome,bonding,difficulty,surface,prepared,by,two,methods,conventional,CLC,speed,microstructure,composition,layers,both,investigated,Benefitting,from,cooling,energy,density,has,better,uniformity,tighter,than,achieving,improvement,cycling,lifetime,Besides,exhibit,times,those,spraying,It,further,confirms,great,effects,metallurgical,internal,cracking,interface,peeling,corresponding,failure,mechanism,discussed
AB值：
0.429379
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