JP2004162178A - Ir添加PtTi高温形状記憶合金 - Google Patents
Ir添加PtTi高温形状記憶合金 Download PDFInfo
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- JP2004162178A JP2004162178A JP2003352793A JP2003352793A JP2004162178A JP 2004162178 A JP2004162178 A JP 2004162178A JP 2003352793 A JP2003352793 A JP 2003352793A JP 2003352793 A JP2003352793 A JP 2003352793A JP 2004162178 A JP2004162178 A JP 2004162178A
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Abstract
【構成】 Pt-42〜63at%Ti合金にIrが添加され、Ptの一部がIrで置換される。
【選択図】図2
Description
マルテンサイト変態に基づいて、PtTi合金では、1000℃付近で形状記憶効果が発現する。そして、PtTi合金にIrを添加することにより形状記憶効果の発現温度が上昇し、1200℃付近で形状記憶効果が発現する。このことから、Irが添加されたPtTi合金は、1000℃〜1200℃の温度域で使用可能な高温形状記憶合金といえる。化学プラント、エンジン等に使用される高温センサーやアクチュエイター等の材料としての適用が有望視される。
これは、上記の範囲内でPtTi合金はB2単相となり、それ以外の範囲では他の相が出現し、マルテンサイト変態に影響を及ぼすからである。
、Pt-50at%Ti合金及びIr-50at%Ti合金と比較した。1250℃で24時間熱処理した後、氷塩水中に入れて急冷した。
だ構造に変化するが、高温のB2相からB19をベースとした他の相に変態していることが確
認される。
すが、収縮のみが認められ、また、はじめの長さには戻らない。このような現象からマルテンサイト変態による形状記憶回復が示唆される。
Claims (2)
- Pt-42〜63at%Ti合金にIrが添加され、Ptの一部がIrで置換されていることを特徴とするIr添加PtTi高温形状記憶合金。
- Pt-50at%Ti合金にIrが50at%未満添加され、Ptの一部がIrで置換されている請求項1記
載のIr添加PtTi高温形状記憶合金。
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JP2003352793A JP2004162178A (ja) | 2002-10-25 | 2003-10-10 | Ir添加PtTi高温形状記憶合金 |
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JP2003352793A JP2004162178A (ja) | 2002-10-25 | 2003-10-10 | Ir添加PtTi高温形状記憶合金 |
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JP2004162178A true JP2004162178A (ja) | 2004-06-10 |
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JP2003352793A Pending JP2004162178A (ja) | 2002-10-25 | 2003-10-10 | Ir添加PtTi高温形状記憶合金 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008150705A (ja) * | 2006-11-22 | 2008-07-03 | National Institute For Materials Science | PtTi系高温形状記憶合金 |
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2003
- 2003-10-10 JP JP2003352793A patent/JP2004162178A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008150705A (ja) * | 2006-11-22 | 2008-07-03 | National Institute For Materials Science | PtTi系高温形状記憶合金 |
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