| Project/Area Number |
17K06041
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Yamagata University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2017-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | マイクロバブル / ポーラス金属 / 超音波 / ナノ粒子 / 材料加工・処理 |
|---|
| Outline of Final Research Achievements |
Porous metal is a metal material that has a porous structure inside. Porous metal is considered to be a promising functional material with high impact energy absorption, heat insulation, and sound absorption properties due to the presence of voids inside. In this study, we succeeded in generating porous metal safely only by blowing gas into molten metal using microbubble generation technology using ultrasonic waves. From the mechanical properties test, it was confirmed that the porous metal had a plateau region peculiar to the porous metal in the compression test, and it was confirmed in the sound absorption test that it also exhibited sound absorption depending on the frequency band.
|
| Academic Significance and Societal Importance of the Research Achievements |
近年，環境負荷低減の観点から自動車等の輸送機器の軽量化が求められており，ポーラス金属は緻密材をポーラス化することから，これらの軽金属を上回る超軽量化を可能にするものとして期待されている．ポーラス金属の生成方法は，金属粉末と発泡剤粉末とを圧粉成形し加熱することで生成させる方法や，溶融金属に増粘剤と発泡剤を添加し生成させる方法等がある．しかしこれらの方法では，金属粉末による爆発の危険性や工程の複雑化が課題である．本研究で金属の溶融体に直接マイクロバブルを吹き込んで固めるポーラス金属製法が確立できれば微細な気孔を有するポーラス金属を安全かつ単純な工程で生成可能になると期待される．
|
