發(fā)布時(shí)間：2018-02-22 13:14

  本文關(guān)鍵詞： 熱障涂層 新型陶瓷材料 熱物理性能 熱應(yīng)力　出處：《表面技術(shù)》2016年09期 　論文類型：期刊論文

【摘要】：隨著先進(jìn)渦輪發(fā)動(dòng)機(jī)性能的進(jìn)一步提升,尋求低熱導(dǎo)率、高熱膨脹系數(shù)的新型陶瓷材料已經(jīng)成為熱障涂層領(lǐng)域的研究熱點(diǎn)。計(jì)算機(jī)數(shù)值模擬在新型陶瓷及其涂層性能研究方面發(fā)揮了重要作用。綜述了新型熱障涂層陶瓷材料相結(jié)構(gòu)、熱物理性能、力學(xué)性能和對應(yīng)涂層隔熱性能、涂層有效熱導(dǎo)率及涂層熱應(yīng)力等幾個(gè)方面國內(nèi)外計(jì)算機(jī)數(shù)值模擬研究成果,并指出了以上幾個(gè)方面計(jì)算機(jī)數(shù)值計(jì)算研究存的不足。未來材料物理性能計(jì)算應(yīng)當(dāng)多研究元素?fù)诫s及新材料相結(jié)構(gòu)隨溫度和壓力的變化關(guān)系,開發(fā)新的數(shù)學(xué)模型提高熱導(dǎo)率、熱膨脹系數(shù)及各種力學(xué)性能參數(shù)的計(jì)算精度。涂層的隔熱性能和有效熱導(dǎo)率方面應(yīng)當(dāng)進(jìn)一步系統(tǒng)化,將各種涂層結(jié)構(gòu)、涂層顯微組織、材料組成及導(dǎo)熱方式的影響考慮在內(nèi),開發(fā)新的計(jì)算方法并提高計(jì)算精度;涂層的沖擊和殘余熱應(yīng)力計(jì)算中未引入基體條件(材質(zhì)、尺寸、粗糙度、溫度)、涂層結(jié)構(gòu)、界面形貌、涂層缺陷、單層厚度、服役環(huán)境等方面的影響,并應(yīng)注重與實(shí)驗(yàn)結(jié)果進(jìn)行對比。
[Abstract]:With the further improvement of the performance of advanced turbine engines, the search for low thermal conductivity, New ceramic materials with high thermal expansion coefficient have become a hot topic in the field of thermal barrier coatings. Computer numerical simulation plays an important role in the study of new ceramics and their coating properties. The phase structure of new thermal barrier coatings ceramic materials is reviewed. The thermal physical properties, mechanical properties and thermal insulation properties of the coating, the effective thermal conductivity of the coating and the thermal stress of the coating are studied by computer numerical simulation at home and abroad. It also points out the deficiency of the computer numerical calculation in the above aspects. In the future, the physical properties of materials should be calculated by studying the relationship of element doping and phase structure of new materials with temperature and pressure, and developing new mathematical models to improve the thermal conductivity. The calculation accuracy of thermal expansion coefficient and various mechanical property parameters. The thermal insulation and effective thermal conductivity of the coating should be further systematized, taking into account the influence of the coating structure, coating microstructure, material composition and thermal conductivity. Development of a new calculation method and improvement of calculation accuracy. No matrix conditions (material, size, roughness, temperature, coating structure, interface morphology, coating defect, single layer thickness) were introduced in the calculation of the impact and residual thermal stress of the coating. The effect of service environment should be compared with the experimental results.
【作者單位】： 河南工程學(xué)院計(jì)算機(jī)學(xué)院;鄭州鐵路職業(yè)技術(shù)學(xué)院電氣工程系;河南工程學(xué)院機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金(U1304512) 河南省高�？萍紕�(chuàng)新人才支持計(jì)劃項(xiàng)目(13HASTIT018) 河南省科技攻關(guān)計(jì)劃項(xiàng)目(132102210142) 河南省博士后科研資助項(xiàng)目(2014069)~~
【分類號】：TG174.4

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本文編號：1524492