文章信息/Info

Title:

The state-of-art of ultra-high-temperature structural MoSi2

作者:

張來啟;  高強;  林均品

北京科技大學新金屬材料國家重點實驗室 北京100083

Author(s):

Zhang Laiqi;  Gao Qiang;  Lin Junpin

State Key Laboratory for Advanced Metals And Materials, University of Science and Technology Beijing, Beijing 100083

關鍵詞:

MoSi2;  復合化;  合金化;  Pest;  綜述

DOI:

10.7502/j.issn.1674-3962.2015.02.04

文獻標志碼:

A

摘要:

MoSi2是繼Ni基高溫合金以及第二代高溫TiAl之后的第三代超高溫結構材料，具有高的熔點、較低的密度和優異的高溫抗氧化性。但是目前由于低溫脆性較大，高溫強度尤其是蠕變強度不足，以及400-600℃抗氧化性差的原因，限制了其工業應用。本文介紹了碳化物、碳納米管、硼化物、氧化物、氮化物以及復相協同增強MoSi2基復合材料，MoSi2的Al、Re、Al-Re、Nb、W、Mg等其它合金化，以及MoSi2低溫氧化(Pest)方面的國內外進展，指出復相協同作用有助于提高材料的綜合力學性能，認為合金化協同第二相復合化、復合化和合金化的“少量多元”是未來改善MoSi2超高溫結構材料綜合性能的重要發展方向。

Abstract:

Following the Ni-base superalloy as well as a second-generation high-temperature TiAl alloy, MoSi2 is the third-generation ultra-high-temperature structural material which possesses a high melting point, low density and excellent oxidation resistance at elevated temperature. Unfortunately, up to now the low temperature brittleness, insufficient high-temperature strength, especially creep strength and poor oxidation resistance at about 400-600℃ limit its application in industry. The research development of MoSi2-based composites reinforced with carbides, carbon nano-tube, borides, oxides, nitrides, and synergistic complex phases was summarized. Also, the state- of- art of the alloying of MoSi2 with Al, Re, Al-Re, Nb, W, Mg, and so on was reviewed. In addition, the research development o-f the low temperature oxidation of MoSi2 (Pest) was summarized. At the end, it was pointed out that synergistic complex phase reinforcement is helpful to improve the balanced mechanical properties of MoSi2. With respect of compositing and alloying, synergy of compositing and alloying, and "small multiple" should be the future directions of development to improve the balanced properties of MoSi2.