Processing for multi-functions・Materials development

多功能加工・材料开发

• 批准号: 11221202
• 负责人: HANADA Shuji
• 金额: $ 35.65万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11221202/
• 关键词: harmonic material design; very high temperature structural material; high temperature strength; fracture toughness; oxidation resistance; in-situ composite; interface; microstructure; 強度; 靭性; 複合鋼板; 耐酸化コーティング; 生体用形状記憶合金

Strength, fracture toughness and oxidation resistance were selected among many properties for high temperature structural materials and harmonic material design was studied.In-situ composites consisting of ductile particle-dispersion refractory intermetallics and ceramics in which both the phases are thermodynamically equilibrated were synthesized by controlling alloying behavior and microstructure. Directionally solidified eutectic ZrC/Mo in-situ composite, which is prepared by the high frequency floating zone melting method, shows the room temperature fracture toughness of about 20 MPam^<1/2> and high strength at 1500C of 420 MPa. The high fracture toughness is attributable to crack deflection arising from decohesion between ZrC and Mo and the high strength at 1500C is due to solid solution strengthening and microstructure refinement.High temperature strength of Mo-Si-B alloys is shown to increase significantly by alloying without sacrificing room temperature fracture toughness. The new concept of "pseudo in-situ composite" is presented and pseudo in-situ Mo-Si-B-O composite is found to exhibit excellent oxidation resistance at 1400C.Based on the fundamental research of the diffusion bonding, clad hot rolling is successfully carried out using Fe_3Al base alloys and CrMo steel. The clad hot rolled sheet shows harmonically high strength, good oxidation resistance and high fracture toughness.

在高温结构材料的众多性能中选择了强度、断裂韧性和抗氧化性，并对谐波材料设计进行了研究。通过控制合金行为和微观结构，合成了两相均为热动力平衡的延性颗粒-弥散难熔金属间化合物和陶瓷原位复合材料。采用高频浮区熔炼法制备的定向凝固共晶ZrC/Mo原位复合材料，室温断裂韧性约为20 MPam^<1/2>， 1500℃时强度高达420 MPa。高断裂韧性是由于ZrC和Mo之间的解聚引起的裂纹偏转，而在1500C时的高强度是由于固溶体强化和组织细化。Mo-Si-B合金在不牺牲室温断裂韧性的情况下，显著提高了合金的高温强度。提出了“伪原位复合材料”的新概念，发现伪原位Mo-Si-B-O复合材料在1400C时具有优异的抗氧化性能。在对扩散连接进行基础研究的基础上，成功地对Fe_3Al基合金和CrMo钢进行了复合热轧。复合热轧薄板具有高强度、良好的抗氧化性和高断裂韧性。

项目成果

Naoya Masahashi, Naoyuki Kondo, Sadao Watanabe, Shuji Hanada: "Composite Steel based on Iron Aluminides"Proceedings of 4th Pacific Rim International Conference of Advanced Materials and Processing (PRICM 4), ed. by S. Hanada, Z. Zhong, S. W. Nam, and R. N

Naoya Masahashi、Naoyuki Kondo、Sadao Watanabe、Shuji Hanada：“基于铝化铁的复合钢”第四届环太平洋先进材料与加工国际会议 (PRICM 4) 论文集，编辑。

Yuetsu Danzaki, Kazuaki Wagatsuma, Tsutomu Syoji, Kyosuke Yoshimi: "Dissolution of molybdenum-silicon (-boron) alloys using a mixture of sulfuric nitric and hydrofluoric acids and a sequential correction method for ICP-AES analysis"Fresenius J Anal Chem.

Yuetsu Danzaki、Kazuaki Wagatsuma、Tsutomu Syoji、Kyosuke Yoshimi：“使用硫酸、硝酸和氢氟酸的混合物溶解钼-硅（硼）合金以及 ICP-AES 分析的顺序校正方法”Fresenius J Anal Chem。

S.Hanada, W.Fang: "Superplasticity in Nb_3Al/Nb in-situ composites"Superplasticity-Current status and future. 601. 15-24 (2000)

S.Hanada，W.Fang：“Nb_3Al/Nb原位复合材料的超塑性”超塑性-现状与未来。

C.L.Ma, Y.Tan, H.Tanaka, A.Kasama, R.Tanaka, S.Miura, Y.Mishima, S.Hanada: "Phase Equilibria in Nb-Mo-Rich Zone of the Nb-Si-Mo Ternary System"Mater.Trans.,JIM. 41. 1329-1336 (2000)

C.L.Ma, Y.Tan, H.Tanaka, A.Kasama, R.Tanaka, S.Miura, Y.Mishima, S.Hanada：“Nb-Si-Mo 三元系富 Nb-Mo 区域的相平衡

Kyosuke Yoshimi, Shinya Nakatani, Tomokazu Suda, Shuji Hanada: "Strength and Oxidation of Mo_5SiB_2-based In-situ Composites at High Temperatures"Transactions of the Materials Research Society of Japan. 26. 141-144 (2001)

Kyosuke Yoshimi、Shinya Nakatani、Tomokazu Suda、Shuji Hanada：“Mo_5SiB_2 基原位复合材料在高温下的强度和氧化”日本材料研究学会汇刊。