Thermally sprayed ceramic coatings are applied for the protection of surfaces that exposed mainly to wear, high temperatures, and corrosion. In recent years, great interest has been garnered by spray processes with submicrometric nanometric feedstock materials, due refinement structure improved coating properties. This paper compares microstructure tribological properties alumina using conventi...

Thermal spray is a versatile and cost-effective process to deposit wear corrosion resistant coatings. In this work, relatively new ‘Fe-based’ chemistry comprising boride carbides, explored as ‘greener’ alternative the expensive carcinogenic Co-based coatings mitigate wear. The emergent thermal of high-velocity air-fuel (HVAF) spraying was chosen Fe-based coatings, with oxy-fuel (HVOF) also bein...

In the present investigation, NiCrMoFeCoAl-30%SiO2 composite coating was sprayed on T22 bare steel with HVOF technique. HVOFtechniqueallows production of dense, excellently structured coatings smoother surfaces and enhanced mechanical properties boiler materials. The produced are characterized for their microstructure, corrosion resistance by high-temperature corrosion.The specimen microstructu...

هدف: پژوهش حاضر با هدف بررسی مقایسه اثربخشی گروه درمانی شناختی – رفتاری و ذهن ­آگاهی مبتنی بر شناخت کاهش رفتارهای پرخطر در معتادان ترک افیونی صورت گرفت. روش: روش این شبه آزمایشی طرح پیش آزمون پس همراه کنترل است. جامعه­ی آماری شامل کلیه افراد وابسته به مواد مراجعه کننده مرکز اعتیاد شبکه بهداشت درمان شهرستان سرپل ذهاب نیمه اول سال 1396 بود، نمونه­ گیری دسترس تعداد 36 نفر تشخیص وابستگی اساس معیاره...

To reduce the formation of detrimental complex oxides, bond coatings in thermal barrier for gas turbines are typically fabricated using vacuum plasma spraying (VPS) or high-velocity oxygen fuel (HVOF) process. Herein, VPS and HVOF processes were applied NiCoCrAlY + HfSi-based powder to assess oxidation behavior both coating processes. Each coated sample was subjected 50 cyclic heat treatments a...

Abstract Thermal spray, being a cost- and time-efficient process, is used extensively in industrial engineering sections for mass production of desired coating structures, allowing to deposit wide range materials on various substrates. Conventionally, powder feedstocks are plasma high-velocity oxy-fuel (HVOF) thermal spray that has limitations such as limited feedstock particle size (10-100 µm)...