Abstract NiAl composites with AgNbO3 (NABO1, NiAl–20 wt%AgNbO3) and Ag/Nb2O5 (NABO2, NiAl–8.68 wt%Ag–10.7 wt% Nb2O5) were fabricated by vacuum-hot-pressing sintering. Their tribological performances were evaluated in the range of 25–800 °C. The regeneration mechanisms of AgNbO3 for the composites with different additions methods during a high-temperature friction process were simultaneously investigated. During sintering, the decomposition of AgNbO3 to Ag/NbC phases was aggregately distributed in NABO1, while Ag/Nb2O5 phases in NABO2 formed Ag and NbC phases that were distributed in a monomorphic state. The regeneration mechanism of AgNbO3 relies on Ag/NbC phases distribution in the composites. Particularly, during the high-temperature friction process, Ag/NbC phases in the aggregate state regenerate AgNbO3 more easily than that in the monomorphic state.

中文翻译：

---

分别添加AgNbO3和Ag/Nb2O5的NiAl复合材料中铌酸银在高温下的再生机制

摘要 NiAl 复合材料与 AgNbO3 (NABO1, NiAl–20 wt% AgNbO3) 和 Ag/Nb2O5 (NABO2, NiAl–8.68 wt%Ag–10.7 wt% Nb2O5) 通过真空热压烧结制备。它们的摩擦学性能在 25-800 °C 的范围内进行了评估。同时研究了AgNbO3在高温摩擦过程中对不同添加方法的复合材料的再生机制。在烧结过程中，AgNbO3 分解为 Ag/NbC 相聚集地分布在 NABO1 中，而 NABO2 中的 Ag/Nb2O5 相形成以单晶态分布的 Ag 和 NbC​​ 相。AgNbO3 的再生机制依赖于复合材料中的 Ag/NbC 相分布。特别是在高温摩擦过程中，