本文選題：材料表面與界面 + 熱障涂層�。� 參考：《材料研究學(xué)報(bào)》2017年01期

【摘要】：研究了應(yīng)變幅、預(yù)氧化及高溫保載時(shí)間對(duì)涂覆熱障涂層高溫合金樣品的熱梯度機(jī)械疲勞性能的影響。結(jié)果表明,隨應(yīng)變幅增大,樣品疲勞壽命降低。隨著預(yù)氧化及高溫保載時(shí)間的增加,樣品的氧化損傷增大,疲勞壽命也不斷降低。試驗(yàn)過程中,粘結(jié)層氧化形成的熱生長氧化物層(TGO層)破裂而萌生裂紋,裂紋沿粘結(jié)層/TGO層界面擴(kuò)展而形成分層裂紋,分層裂紋與陶瓷層內(nèi)貫穿裂紋連接導(dǎo)致陶瓷層剝落而失效。考慮到熱障涂層內(nèi)最大應(yīng)力及氧化損傷,建立了一個(gè)涂覆熱障涂層高溫合金樣品的熱梯度機(jī)械疲勞壽命預(yù)測模型。
[Abstract]:The effects of strain amplitude, preoxidation and high temperature loading time on the thermal gradient mechanical fatigue properties of superalloy samples coated with thermal barrier coating were investigated. The results show that the fatigue life decreases with the increase of strain amplitude. With the increase of preoxidation and high temperature loading time, the oxidation damage increases and the fatigue life decreases. During the test, the thermal growth oxide layer (TGO) formed by the oxidation of the bond layer ruptured, and the crack propagated along the interface of the bond layer / TGO layer to form the delamination crack. The connection between delamination crack and penetrating crack in ceramic layer leads to the spalling and failure of ceramic layer. Considering the maximum stress and oxidation damage in thermal barrier coating, a thermal gradient mechanical fatigue life prediction model for superalloy samples coated with thermal barrier coating is established.
【作者單位】： 廣東電網(wǎng)有限責(zé)任公司電力科學(xué)研究院;西門子中國研究院;清華大學(xué)摩擦學(xué)國家重點(diǎn)實(shí)驗(yàn)室微納制造分室;
【基金】：南方電網(wǎng)科研項(xiàng)目(KGD2014-0595)~~
【分類號(hào)】：TG174.4

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王利強(qiáng) ,閻殿然 ,何繼寧 ,宋向陽;熱障涂層研究狀況及進(jìn)展[J];新技術(shù)新工藝;2002年03期

2 謝冬柏,王福會(huì);熱障涂層研究的歷史與現(xiàn)狀[J];材料導(dǎo)報(bào);2002年03期

3 劉志;周洪;;熱障涂層研究進(jìn)展[J];河海大學(xué)常州分校學(xué)報(bào);2006年03期

4 李美Y，

本文編號(hào)：2051299