文章信息/Info

Title:

A Review of Ultra High Temperature Nb-Si Based Superalloys

作者:

賈麗娜; 翁俊飛; 沙江波; 周春根; 張虎

北京航空航天大學材料科學與工程學院

Author(s):

JIA Lina;  WENG Junfei;  SHA Jiangbo;  ZHOU Chungen;  ZHANG Hu

School of Materials Science and Engineering, Beihang University

關鍵詞:

Nb-Si金屬間化合物基超高溫合金; 組織特征; 綜合性能

DOI:

10.7502/j.issn.1674-3962.2015.05.08

文獻標志碼:

A

摘要:

Nb-Si金屬間化合物基超高溫合金具有熔點高、密度低、高溫強度和加工性能良好的優點，被認為是最有希望取代第三代Ni基單晶高溫合金的候選材料。本文介紹了Nb-Si金屬間化合物基超高溫合金的典型組織特征、合金成分優化、組織控制以及組成相的作用等方面的研究進展。目前，室溫韌性、高溫強度和高溫抗氧化性能等單項指標基本達到應用要求，但綜合性能指標距航空發動機熱端部件的應用要求還有較大差距。未來，在合金優化設計的基礎上，如何尋求更合適的組織控制途徑，實現室溫韌性、高溫強度和高溫抗氧化性能的綜合匹配，是Nb-Si金屬間化合物基超高溫合金發展的重要研究方向。

Abstract:

With high melting point, low density, and good high-temperature strength and processability, ultra high temperature Nb-Si intermetallic based superalloys are considered as the most promising materials for replacing the third generation of monocrystal Ni-based superalloys. This paper introduced a series of results regarding typical microstructure characteristics, alloys’ compositions optimization, microstructural control, and roles of constituent phases for Nb-Si based superalloys. Recently, some property, such as room-temperature fracture toughness, high-temperature strength, and oxidation resistance, has met the application requirements of turbine airfoil materials. However, there is still a gap between the current comprehensive properties and application requirements. In the future, based on the optimization of alloy design, how to develop a more available process for microstructural control to achieve a comprehensive combination of room-temperature fracture toughness, high-temperature strength, and oxidation resistance, is important for the development of ultra high temperature Nb-Si intermetallic based superalloys.