溶融塩電析とレーザー溶融法の複合表面改質による耐高温腐食表面の作製

采用熔盐电沉积和激光熔化方法联合表面改性制备高温耐腐蚀表面

• 批准号: 07750792
• 负责人: 佐藤 芳幸
• 金额: $ 0.64万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Encouragement of Young Scientists (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07750792/
• 关键词: 表面改質; ニッケル; イットリウム; 溶融塩電析; レーザー表面処理; 金属間化合物; 高温酸化; 熱重量法

本研究費により,本計画の中心装置であるレーザー変位計を用いた自動記録型熱天秤装置の新規作製を完了した.装置の測定精度は,従来品と同等以上であった.以下に,本計画全体の結果を示す.1.溶融塩電析とレーザー溶融法による高温耐食性表面の作製について母金属には10mm×10mm×1mmに切りだした純Niを用いた.この試料を800℃の2mol%YCl_3-49mol%Nacl-49mol%KCl溶融塩中で,炭素棒を対極としてカソード定電位電解し,表面にYを電析させた.電析電位-2.0V(vs.Ag/Agcl(0.1)),電析時間30分の条件で電析させたYは,金属Niとの相互拡散によりNi-Y系金属間化合物(Ni_3Y,Ni_5Y)を形成した.この皮膜は100μm以上の厚さを持つ一様な皮膜であり,下地Niとの密着性は非常に良好であった.電析後の試料は,CO_2ガスレーザー(PSI社製,出力500W,ビーム走査速度95mm/sec)で表面溶融させた.2.Y電析試料の高温耐食性純Ni,Y電析Ni,およびレーザー照射後のY電析Ni試料を,1000℃の純酸素雰囲気中で16時間高温酸化し,新規作製した熱天秤により質量変化を測定した.その結果,純Niに対し,Yを電析させた試料の酸化増量は3倍程度大きくなった.これは,電析過程によりNi-Y系金属間化合物が形成され,Niに対するYの比率が大きくなり,いわゆるYのキ-イング効果が現れずむしろYの強い酸素との親和力が発揮されたためと思われる.それに対し,レーザー溶融処理したY電析Niの酸化増量は純Niよりもわずかに小さくなった.これはレーザー溶融処理過程ですでにY_2O_3が熱処理層中に現れ,下地金属を保護する役割を果たしたためと考えられる.以上のように,本研究費による実験は滞りなく完了し,若干の新しい知見が得られた.

In this study, the central device of this project has been completed by using the new rules of the automatic logging Libra device. The measuring accuracy of the device is the same as that of the incoming product. All the results of this project are shown below. 1. The high-temperature food-resistant surface was used as the parent metal of 10mm × 10mm × 1mm for the treatment of high temperature food-resistant surface. The alloy was dissolved in 2mol%YCl_3-49mol%Nacl-49mol%KCl at 800C, carbon rods were used to determine the potential electrolysis, and the surface was analyzed by Y-ray diffraction. The analytical potential is-2.0V (vs.Ag/Agcl (0.1V)). Under the condition of 30 minutes, the metal Ni is dispersed to each other and the Ni-Y intermetallic compound (Ni_3Y,Ni_5Y) is formed. The thickness of the skin film is more than 100 μ m, the thickness of the skin film is more than 100 μ m, and the adhesion of the skin film is very good. After PSI, the surface melting temperature of Ni,Y (PSI society, 500W output, 95mm/sec). 2.Y, high temperature, food resistance, Ni,Y, Ni, radiation, Ni, acid acid, acid temperature, temperature The results showed that the acidizing amount of Ni and Y was 3 times higher than that of other materials. During the process of electroanalysis, the formation of Ni-Y intermetallic compounds is sensitive, the ratio of Ni to Y is very high, and the temperature is very high. The amount of Ni acidizing, the amount of Ni, the temperature, the temperature and the temperature. In the process of melting, there is a problem in the process of melting. In the process of melting, there is a problem in the process of melting. In the process of melting, there is a problem in the process of solution. in the process of melting, there is a problem in the process of solution. in the process of melting, there is a problem in the process of solution. in the process of melting, there is a problem in the process of solution. in the process of melting, there is a problem in the process of melting. In this study, some new insights have been made.